Report on Comments F2005 Copyright, NFPA NFPA 79 Report of the Committee on Electrical Equipment of Industrial Machinery National Electrical Code

Transcription

1 Report of the Committee on Electrical Equipment of Industrial Machinery National Electrical Code James W. Carpenter, Chair International Association of Electrical Inspectors, TX [E] Rep. International Association of Electrical Inspectors Michael I. Callanan, Chair National Joint Apprentice & Training Committee, MD [L] Rep. International Brotherhood of Electrical Workers Mark W. Earley, Secretary (Staff-NV) National Fire Protection Association, MA Jean A. O Connor, Recording Secretary (NV) National Fire Protection Association, MA James E. Brunssen, Telcordia, NJ [UT] Rep. Alliance for Telecommunications Industry Solutions Michael I. Callanan, National Joint Apprentice & Training Committee, MD [L] Rep. International Brotherhood of Electrical Workers William R. Drake, Marinco, CA [M] John R. Kovacik, Underwriters Laboratories Inc., IL [RT] William M. Lewis, Martinsville, IN [U] Rep. American Chemistry Council Jim Pauley, Square D Company/Schneider Electric, KY [M] Rep. National Electrical Manufacturers Association Michael D. Toman, MEGA Power Electrical Services, Inc., MD [IM] Rep. National Electrical Contractors Association John W. Troglia, Edison Electric Institute, WI [UT] Rep. Electric Light & Power Group/EEI Alternates Jeffrey Boksiner, Telcordia Technologies, Inc., NJ [UT] (Alt. to James E. Brunssen) Philip H. Cox, Bigelow, AR [E] (Alt. to James W. Carpenter) James M. Daly, General Cable, NJ [M] (Alt. to Jim Pauley) Stanley J. Folz, Morse Electric Company, WI [IM] (Alt. to Michael D. Toman) Palmer L. Hickman, National Joint Apprentice & Training Committee, MD [L] (Alt. to Michael I. Callanan) Neil F. LaBrake, Jr., Niagara Mohawk, a National Grid Company, NY [UT] (Alt. to John W. Troglia) Danny P. Liggett, Dupont Company, TX [U] (Alt. to William M. Lewis) Mark C. Ode, Underwriters Laboratories Inc., NC [RT] (Alt. to John R. Kovacik) Nonvoting Richard G. Biermann, Biermann Electric Company, Inc., IA [IM] (Member Emeritus) D. Harold Ware, Libra Electric Company, OK [IM] (Member Emeritus) Committee Scope: This Committee shall have primary responsibility for documents on minimizing the risk of electricity as a source of electric shock and as a potential ignition source of fires and explosions. It shall also be responsible for text to minimize the propagation of fire and explosions due to electrical installations. Report of the Committee on William Anderson, The Procter & Gamble Company, OH [U] John F. Bloodgood, JFB Enterprises, WI [SE] Frank C. DeFelice, Jr., Cytec Industries, Inc., CT [U] Drake A. Drobnick, Visteon Corporation, MI [U] David Fisher, Allen-Bradley Company, Inc., WI [M] Rep. National Electrical Manufacturers Association Glyn R. Garside, TUV Rheinland of North America, Inc., IL [RT] Charles A. Goetz, Underwriters Laboratories Inc., IL [RT] Mark R. Hilbert, State of New Hampshire, NH [E] Rep. International Association of Electrical Inspectors Thomas J. Kiihr, Jr., Delphi Corporation, MI [U] John Knecht, Intertek Testing Services NA, Inc., IL [RT] Gary J. Locke, Lockheed Martin Systems Integration, NY [U] Robert C. Monteith, Milacron Incorporated, OH [M] Rep. Society of the Plastics Industry, Inc. Larry D. Munson, Universal Instruments Corporation, NY [M] Carl E. Padgett, Jr., Milford, OH [M] Rep. The Association for Manufacturing Technology Thomas Pilz, Pilz Automation Safety L.P., MI [M] Melvin K. Sanders, Things Electrical Co., Inc. (TECo., Inc), IA [U] George M. Schreck, Komatsu America Industries, LLC, IL [M] Alternates Michael H. Appold, Delphi Corporation, MI [U] (Alt. to Thomas J. Kiihr) James C. Carroll, Square D Company, TN [M] (Alt. to David Fisher) John H. Keinath, General Motors, MI [U] (Voting Alt. to GM Rep.) Christine Livingston, Visteon Corporation, MI [U] (Alt. to Drake A. Drobnick) Loren Mills, Demag Plastics Group, OH [M] (Alt. to Robert C. Monteith) Jim F. Pierce, Intertek Testing Services NA, Inc., OR [RT] (Alt. to John Knecht) Paul R. Warndorf, Association For Manufacturing Technology (AMT), VA [M] (Alt. to Carl E. Padgett) Staff Liaison: Joseph V. Sheehan Committee Scope: This Committee shall have primary responsibility for documents intended to minimize the potential hazard of electric shock and electrical fire hazards of industrial metalworking machine tools, woodworking machinery, plastics machinery and mass production equipment, not portable by hand. This Committee shall have primary jurisdiction but shall report to the Association through the Technical Correlating Committee of the National Electrical Code. This portion of the Technical Committee Report of the Committee on National Electrical Code is presented for adoption. This Report on Comments was prepared by the Technical Committee on Electrical Equipment of Industrial Machinery, and documents its action on the comments received on its Report on Proposals on NFPA 79, Electrical Standard for Industrial Machinery, 2002 edition, as published in the Report on Proposals for the 2005 November Meeting. This Report on Comments has been submitted to letter ballot of the Technical Committee on Electrical Equipment of Industrial Machinery, which consists of 19 voting members. The results of the balloting, after circulation of any negative votes, can be found in the report. This Report on Comments has also been submitted to letter ballot of the Technical Correlating Committee on National Electrical Code which consists of 9 voting members; of whom 9 voted affirmatively. 79-1

2 79-1 Log #42 Final Action: Accept in Part (Entire Document) Submitter: William Anderson, The Procter & Gamble Company Recommendation: Reconsider the original proposal. Retain the AIP to accept the change in and extend the AIP to include the original proposal and any changes proposal by the task group formed to review proposal 79-3 (Log #158) to the misused terms can and cannot contained in the main text of this standard. And in correct the vague term might ; and in (1) clarify the vague use of the word should does not imply to negate mandatory action stated elsewhere. The details of the original recommended changes to replace the terms can and cannot, might and should in the main text is contained in the original proposal published in the committee s last ROP, and repeated and updated to reflect the changes noted within the ROP (see data following the Substation below). Data: Section # Current text Change to Proposed change shown in context: (6b) can occur that can be started occurs start Where two or more disconnecting means are provided within the control enclosure for multiple supply circuits, they shall be grouped in one location where practicable. Protective interlocks for their correct operation shall be provided where a hazardous condition or damage to the machine or to the work in progress can occurs Where the supply circuit disconnecting device is one of the types in (1) through (5), the device shall fulfill all of the following requirements: (6b) that can be operated that operates (6) Be rated for the application as follows: a. The ampere rating shall be at least 115 percent of the sum of the fullload currents required for all equipment that may be in operation at the same time under normal conditions of use. b. Where rated in horsepower, the horsepower rating shall be at least equal that which is defined by Table (B) of NFPA 70, National Electrical Code, for a locked rotor equivalent equal to the largest sum resulting from the locked rotor currents of any combination of motors that can be started simultaneously and the fullload currents of the remaining motor and non-motor loads that can be operated at that time Where the supply circuit disconnecting device is one of the types in (1) through (5), the device shall fulfill all of the following requirements: can create creates (6) Be rated for the application as follows: a. The ampere rating shall be at least 115 percent of the sum of the fullload currents required for all equipment that may be in operation at the same time under normal conditions of use. b. Where rated in horsepower, the horsepower rating shall be at least equal that which is defined by Table (B) of NFPA 70, National Electrical Code, for a locked rotor equivalent equal to the largest sum resulting from the locked rotor currents of any combination of motors that can be started simultaneously and the fullload currents of the remaining motor and non-motor loads that can be operated operates at that time Means for removal of power shall be provided when prevention of unexpected start-up is required (e.g., during maintenance where the unexpected start-up of a machine can creates a hazard). Such means shall be as follows: can be accomplished is accomplished (or shall be accomplished ) Removal of power can be is accomplished by the use of the supply circuit disconnecting means, additional devices conforming to 5.3.2, or other means (e.g., a contactor switched off by a control circuit). 79-2

3 Section # Current text Change to Proposed change shown in context: (2b) cannot that can only be is not to that is only Other means of removal of power shall be employed only for situations that include the following: (1) Routine exchange of parts, fixtures, and tools requiring no significant dismantling of the machine (2) Work on the electrical equipment where all of the following conditions exist: a. There is no hazard arising from electric shock and burn. b. The switching off means cannot is not to be negated by the work. c. The work is of a minor nature (e.g., replacement of plug-in devices without disturbing existing wiring). d. There is no hazard arising from the unexpected energizing of de-energizing of circuits Protection by Insulation of Live Parts. Live parts removed removed by protected by insulation shall be completely covered with insulation that can is only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which it can is be subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products are inadequate for protection against electric shock under which it can be subjected which it is subjected doors can be doors are capable of being (Alternate: non of the doors open unless ) 6.2.4(2) there cannot be any there is not any 6.4.2(4) terminals cannot exceed terminals does not exceed normal operating conditions Protection by Insulation of Live Parts. Live parts protected by insulation shall be completely covered with insulation that can is only be removed by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical, and thermal stresses to which it can is be subjected under normal operating conditions. Paints, varnishes, lacquers, and similar products are inadequate for protection against electric shock under normal operating conditions Enclosure Interlocking. When required by each disconnecting means mounted within or adjacent to a control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or electrically interlocked, or both, with the control enclosure doors so that none of the doors can be doors are capable of being opened unless the power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed Enclosure Access Where a qualified (skilled) person, using appropriate work practices, needs to enter an enclosure that does not have a disconnect, one of the following conditions shall be met: (1) The use of a key or tool shall be required for opening the enclosure. (2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without disconnection of live parts only when all live parts inside are separately enclosed or guarded such that there cannot be is not any direct contact with live parts by a test finger Sources for PELV. The source for PELV shall be one of the following: (1) A safety isolating transformer (2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer (e.g., a motor generator with winding providing equivalent isolation) (3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit (e.g., a diesel-driven generator) (4) An identified electronic power supply conforming to appropriate standards specifying measures to be taken to ensure that, even in the case of an internal fault, the voltage at the outgoing terminals cannot does not exceed the values specified in (1) can exceed exceeds Overcurrent protection shall be provided where the current in a machine circuit can exceeds either the rating of any component in the circuit or the current carrying capacity of the conductors in the circuit, whichever is the lesser value. 79-3

4 Section # Current text Change to Proposed change shown in context: device can include device includes where it can be determined service that might be encountered where it is determined service that is encountered cannot be adequately is not adequately 7.2.9* Short-Circuit Interrupting Rating. The shortcircuit interrupting rating shall be at least equal to the available fault current at the point of application. Where the short-circuit current to an overcurrent protective device can includes additional currents other than from the supply (e.g., from motors, from power factor correction capacitors), these shall be taken into consideration Where the branch-circuit, short-circuit, and ground-fault protective device is selected not to exceed that allowed by for the smallest rated motor, two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where it can be is determined that the branch-circuit short-circuit and ground-fault protective device will not open under the most severe normal conditions of service that might be is encountered Where the branch-circuit, short-circuit, and ground-fault protective device is selected not to exceed that allowed by for the smallest rated motor, two or more motors or one or more motors and other load(s), with each motor having individual overload protection, shall be permitted to be connected to a branch circuit where it can be is determined that the branch-circuit short-circuit and ground-fault protective device will not open under the most severe normal conditions of service that might be is encountered Short-time-rated motors or high-reversing duty motors that cannot be is not adequately protected by external overload devices shall be protected by a thermal device mounted in the motor and sensitive to the temperature of the motor, or to both motor temperature and current can cause can cause causes causes 7.4* Abnormal Temperature Protection. Resistance heating or other circuits that are capable of attaining or causing abnormal temperatures and, therefore, can causes a hazardous condition shall be provided with suitable detection to initiate an appropriate control response General. Where a supply interruption or a voltage reduction can causes a hazardous condition or damage to the machine or to the work in progress, undervoltage protection shall be provided (e.g., to switch off the machine) at a predetermined voltage level. Where only a part of the machine or of the group of machines working together in a coordinated manner is affected by the voltage reduction or supply interruption, the undervoltage protection shall initiate appropriate control responses to ensure coordination machine can allow machine allows Undervoltage Protection. Where the operation of the machine can allows for an interruption or a reduction of the voltage for a short time period, delayed undervoltage protection shall be permitted to be provided. The operation of the undervoltage device shall not impair the operation of any stopping control of the machine restart can cause restart causes Restarting. Upon restoration of the voltage or upon switching on the incoming supply, automatic or unintentional restarting of the machine shall be prevented when such a restart can causes a hazardous condition. 7.8 voltage can cause voltage causes 7.8* Phase Sequence Protection. Where a phase loss or an incorrect phase sequence of the supply voltage can causes a hazardous condition or damage to the machine, protection shall be provided. 79-4

5 Section # Current text Change to Proposed change shown in context: 8.2.1(3) that can be caused safeguards cannot be that is caused safeguards are Grounding System. The equipment grounding (protective bonding) circuit shall consist of the following: (1) Equipment grounding (PE) terminal(s) (2) Conductive structural parts of the electrical equipment and the machine (3) Equipment grounding (protective) conductors and equipment bonding jumpers All parts of the equipment grounding (protective bonding) circuit shall be capable of withstanding the highest thermal and mechanical stress that can be is caused by fault currents flowing in that part of the circuit. All exposed conductive parts of the electrical equipment and the machine(s) shall be connected to the equipment grounding (protective bonding) circuit. Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energized shall not be required to be grounded On those machines where safeguards cannot be applied not applied are not applied for certain operations, manual control of such operations shall be by hold-to-run controls together machine cannot tolerate machine does not tolerate equipment can cause equipment causes memory can result memory results with enabling devices Emergency switching off shall be accomplished by disconnecting the incoming supply circuit of the machine effecting a Category 0 stop. Where the machine cannot does not tolerate the Category 0 stop, it shall be necessary to provide other protection, (e.g., against direct contact) so that emergency switching off is not necessary * General Requirements. Where failures or disturbances in the electrical equipment can causes a hazardous condition or damage to the machine or the work in progress, measures shall be taken to minimize the probability of the occurrence of such failures or disturbances Where a memory is used, its functioning in the event of power failure shall be ensured (e.g., by using a nonvolatile memory) where such loss of memory can results in a hazardous condition it can be easily read it is easily read A legend shall be provided for each operator interface device to identify its function and shall be located so that it can be is easily read by the machine operator from the normal operator position. The legends shall be durable and suitable for the operating environment. Exception: Emergency stop devices require no legend if they meet the requirements of (1) task should be performed task needs to be performed Modes of Use. Indicator lights and icons of color graphic interface devices shall provide the following information: (1) Indication to attract the operator s attention or to indicate that a certain task should needs to be performed. The colors RED, YELLOW (AMBER), GREEN, and BLUE are normally used in this mode which can affect which affects Electrical Noise and Transient Suppression. Transient suppression, isolation, or other appropriate means shall be provided where the electronic equipment generates electrical noise or transients, which can affects the operation of equipment that they can be identified can be readily identified that they are identified is readily identified All items of control equipment shall be placed and oriented so that they can be are identified without moving them or the wiring. Where practicable, items that require checking or adjustment for correct operation or that are liable to need replacement, those actions shall be possible without dismantling other equipment or parts of the machine (except opening doors or removing covers). Terminals not associated with control equipment shall also conform to these requirements Terminal groups for power circuits, associated control circuits, and other control circuits shall be permitted to be mounted adjacently, provided that each group can be is readily identified (e.g., by markings, by use of different sizes, by use of barriers, by colors). 79-5

6 Section # Current text Change to Proposed change shown in context: dust can penetrate can attain dust penetrates attains Openings shall not be permitted between enclosures containing electrical equipment and compartments containing coolant, lubricating fluids, or hydraulic fluids, or compartments into which oil, other liquids, or dust can penetrates. This requirement shall not apply to electrical devices specifically designed to operate in oil (e.g., electromagnetic clutches) nor to electrical equipment in which coolants are used Equipment that, in normal or abnormal operation, (1) temperatures as can be generated can attains a surface temperature sufficient to cause a risk of fire or harmful effect to an enclosure material shall be one of the following: (3) material that can withstand temperatures that are generated material that withstands (1) Located within an enclosure that will withstand, without risk of fire or harmful effect, such temperatures as can be that are generated (3) Otherwise screened by material that can withstands, without risk of fire or harmful effect, the heat emitted by the equipment that can exist that exist * General. Conductors, cables, and flexible cords shall be selected for the operating conditions and external influences that can exist. Conductors, cables, and flexible cords shall be identified for their intended use conductors can come conductors come All sharp edges, flash, burrs, rough surfaces, or threads that the insulation of the conductors can come in contact with shall be removed from raceways (ducts) and fittings. Where necessary, additional protection consisting of a flame-retardant, oil-resistant insulating material shall be provided to protect conductor insulation means can be removed means are removable 15.7 rotation can produce rotation produces equipment that can be in operation where it can be easily read device can be readily located equipment can be programmed equipment that is in operation where it is easily read device is readily located equipment is programmable Substantiation: The changes in the proposal 79-1 (Log #57) are needed, based on the Manual of Style 2003 edition Sub section Unenforceable Terms, and Webster s Collegiate Dictionary 10th (MOS: 2003, sub section ) and the apparent intended meaning in the misuse of the terms can and cannot The use of can and cannot in the NFPA , as shown in the details of proposal (79-1), has two possibilities neither meet the requirements if the (MOS 2003 subsection ). One possible use of the terms can and cannot is as a transitive verb, which is an archaic use and thus should not be used in this standard, unless there is a special need for such archaic use which is deliberately intended, but that use also needs to be consistent with the requirements of MOS subsection Unenforceable terms requirements and Multiple meanings and defined. The second possibility to use the term can or cannot is as a verbal auxiliary and take the meanings of Each motor and its associated couplings, belts and pulleys, or chains and sprockets shall be mounted so that they are adequately protected from physical damage and are easily accessible for inspection, maintenance, adjustment and alignment, lubrication, and replacement. The motor mounting arrangement shall be so that all motor hold-down means can be are removedable and all terminal boxes are accessible. An adjustable base or other means of adjustment shall be provided when belt or chain drives are used Direction Arrow. Where reverse rotation can produces an unsafe condition, a direction arrow shall be installed. The arrow shall be adjacent to the motor and plainly visible The full-load current shown on the nameplate shall not be less than the full-load currents for all motors and other equipment that can be is in operation at the same time under normal conditions of use. Where unusual loads or duty cycles require oversized conductors, the required capacity shall be included in the full-load current specified on the nameplate Where a motor nameplate or connection diagram plate is not visible, additional identification shall be provided where it can be is easily read A cross-referencing scheme shall be used in conjunction with each relay, output device, limit switch, and pressure switch so that any contact associated with the device can be is readily located on the diagrams Where the operation of the equipment can be is programmedable, detailed information on methods of programming, equipment required, program verification, and additional safety procedures (where required) shall be provided either a form of power (e.g. potency, know how, capability, consequence) or a form of permitting (e.g. may or permission). The form of can and cannot as permission is not an option (MOS: 2003, subsection Permissive for Alternative Terms ). A vague term in a requirement is interpreted as assuming the maximum (best or worst), normal, or minimum (best or worst) situation or condition is equally applied which is often not the intent of the requirement nor its application. The legitimate cases in NFPA 79 are where can and cannot is used as verbal auxiliary, provided it is defined (MOS 2003 subsection Multiple meanings ). But as is the case with many verbal auxiliaries, removing it will only simplify and improve the clarity of the requirement statement in the standard. The proposed revision, to be reconsidered, is to follow the NFPA manual of style and remove the improper and ambiguous uses of the terms can

7 and cannot as they have appeared in NFPA 79, the details of the proposed corrections remain in the original ROP proposal. in Part The committee rejects the following portions of Comment 79-1: ; (6)(b); 5.4.4(2)(b); 6.2.1; 6.2.1[second occurrence]; 6.2.3; 6.2.4(2); 6.4.2(4); ; ; ; 7.5.1; 8.2.1(3); ; ; ; (1); ; ; ; (1); (3); ; ; ; ; and For accept and accept in principle actions on other portions of this comment, see the following comments: 79-19; 79-20; 79-24; 79-25; 79-26; 79-29; 79-30; 79-32; 79-34; 79-37; 79-38; 79-39; 79-41; 79-43; 79-44; 79-45; 79-50; 79-51; 79-52; 79-56; 79-57; 79-59; 79-60; 79-71; 79-72; 79-73; 79-74; 79-77; 79-85; 79-86; 79-87; 79-93; 79-94; 79-95; and Committee Statement: The committee reaffirms its position that some of the proposed text revisions already contain enforceable requirements and those portions of this comment are rejected for that reason. The committee has however accepted some portions of this comment which do add clarity and aid in enforceability Log #51 Final Action: Accept in Principle in Part (Entire Document) Submitter: William Anderson, The Procter & Gamble Company Comment on Proposal No: Recommendation: Review the following Sheet B as reference to the recommendations listed in Data on the following pages. Substantiation: NFPA Manual of style taking into account and the intended meaning and readability of the document Data: Sheet B Chapter 6 Section 3, Although the MOS allows for discontinuity of titles such as the General subsection And with the title General the following subsection paragraphs do not seem to make logical sense, unless and would be come sub-subsection paragraphs under Thus subsection paragraph would be come sub subsection and subsection paragraph would become sub-subsection paragraph Sheet B Chapter 12 (13 in ROP draft subsection ) The sub section (ROP draft number) Conductor /Terminal Compatibility is only partially related to the section on Conductor ampacity and more logically be placed in the (ROP draft Chapter 13) new renumbered document chapter 12 conductors, Cables and Flexible Cords, 12.1 General section 12.1 as a subsection Conductor / Terminal Compatibility. Sheet B Chapter 12 (13 in ROP draft subsection ) The sub section (ROP draft number) Shielded Conductors New numbering has no other sub paragraphs and thus does not need the title, suggest dropping the title and keep the paragraph numbered as shown (12.6.5) Sheet B Chapter 13 (14 in ROP draft subsection Using the new Chapter 13 numbering (ROP draft number 14); The sub section paragraphs (1 through 5 and 7) would become sub-subsubsection numbered (I through 6) paragraphs under the new sub subsection General. The present sub-subsection on Cable handling systems (ROP Draft numbers including ) would fall under a new sub subsection Cable handling system including the sub-subsubsection paragraphs (new numbers) (1 though 3 and would become and the table would be numbered with reference in to show the correction to the table reference. This is needed because the existing (old ROP draft is not related to the cable handling system but is related to cable handling system. Sheet B Chapter XX Servo drives and (Servo) motors (in ROP draft) The proposed new chapter would make more sense to the reader if it were a moved entirely to its own subsection (new numbering) 14.9 retaining the agreed material in the proposed new chapter. However when looking at the proposed material xx.4.2 either as its own sub section (new numbering) Motor circuit conductors or insert it as subsection , moving the overload protection subsection to sub section and Motor over temperature protection to become subsection In the ROP proposed numbered sub subsection and sub sub-subsection titled and untitled paragraph the hierarchy is not clear and the committee should review the intent, but on proposal would be to drop the title XX.3.1 General and promote the sub sub-subsection paragraph XX to XX.3.1 ( untitled [new numbering ] and promote all the following sub sub-subsections up one and thus without going though all of them the last one (old ROP draft ) number XX would be promoted to XX or new number If the chapter is to remain as a separate new chapter the arrangement of sections and subsection will still have to be addressed as the intended application for the requirements is not clear using the proposed structure. in Principle in Part First, the proposed action to renumber Servo Drives and motors is rejected. Second, only the following is accepted by this comment: (1) Renumber ROP 79-64, Section numbers from and to and Change This to These in the second paragraph of (2) Renumber Section Conductor/Terminal Compatibility to Section (3) Remove the title of Section Shielded conductors. (4) Restructure Section as follows: changes to changes to changes to changes to changes to changes to (5) Restructure Section as follows: changes to changes to changes to changes to Table changes to Table Committee Statement: The committee understands that the sole purpose of this comment is to assist NFPA editors in structuring some renumbered sections. The committee views the implementation of this comment by editors as non binding. See Comment 79-6 for action and statement on Servo Drives. 79-7

8 Chapter Section Subsection Sub-subsection Sub-subsubsection 79-8 ROP Numbering 1 Administration Scope Purpose Application Specific Provisions Other Than NFPA 79 Specific Provisions Not Made in Relation to NFPA 70 State of the Art Referenced 2 2. Publications 1 General NFPA Publications Other Publications ANSI Publications ASTM Publications IEC Publications IEEE Publications NEMA Publications UL Publications Definitions General NFPA Official Definitions General Definitions General 4 4. Operating Conditions 1 General considerations Electrical Components and Devices Electrical supply General Alternating Current (ac) Supplies 1 Voltage Frequency Harmonics Voltage Unbalance (in 3- Phase Supplies) Voltage Impulses Voltage Interruption Voltage Dips Direct Current (dc) Supplies from Batteries 1 Voltage Voltage Interruption Direct Current (dc) Supplies from Converting Equipment 1 Voltage Voltage Interruption Ripple (Peak Physical Environment and Operating Conditions 1 General Electromagnetic compatibility (EMC) Ambient Operating temperature Humidity Altitude Contaminants to-peak

9 Chapter Section Subsection Sub-subsection Sub-subsubsection Non-ionizing radiation Vibration, shock, 4. 5 Transportation and and bump 4. 6 storage Provisions for 4. 7 handling Installation and 5 Incoming supply Circuit Conductor Terminations and Devices for Disconnecting and Removing Power Operating Conditions 8 Available Fault Current 5. 1 Incoming Supply Circuit Conductor Terminations 5. 2 Grounding Terminal Supply Disconnecting (Isolating) Means 1 General Type Requirements Operating Handle Excepted 5. 4 Means for Removal of Circuits Power for Prevention of Unexpected Start- Up 5. 5 Devices for Disconnecting (Isolating) Electrical Equipment 6 Protection against electric shock 6. 1 General Protection against direct contact 1 Protection by Insulation of Live Parts Protection by Enclosures Direct Contact from Outside an Enclosure Enclosure Interlocking Enclosure Protection Against Access Electric Shock from Indirect Contact (Fault Conditions) 1 General (untitled) double insulation (untitled) automatic disconnection 6. 4 Protection by the use of Protective Extra Low Voltage PELV 1 General requirements Sources for Protection Against PELV Protection of Residual Voltages 7 7. equipment 1 General Overcurrent protection General ROP Numbering

10 Chapter Section Subsection Sub-subsection Sub-subsubsection Supply ROP Numbering conductors Power circuits Control circuits General Conductor Protection Receptacle (Socket) Outlets and Their Associated Conductors for Accessory Circuits Lighting circuits Transformers Location of overcurrent protective devices Overcurrent protective devices Rating and setting of overcurrent protective devices Resistance Heating Branch-Circuit Overcurrent Protection Programmable Electronic System Power Supply Input Overcurrent Protection Control Devices Common Overcurrent Device Protection of motors against overheating 1 General Motors Adjustable Speed (Electronic) and (Servo) Drives and Motors Resetting Number of Abnormal temperature Overloads protection Protection against supply interruption or voltage reduction and subsequent restoration General Undervoltage Protection Restarting Overspeed Protection Motor Overspeed Protection Equipment Overspeed Protection 7. 7 (Reserved) Phase sequence protection Protection against overvoltages due to lightning and to switching surges

11 Chapter Section Subsection Sub-subsection Sub-subsubsection Power Factor Correction Capacitors 1 Overcurrent Protection Discharge of Stored Energy 1 Time of , 2 Discharge Means of 8 Grounding discharge 8. 1 General Applicability Connections Equipment Grounding (Protective Bonding) Circuit Grounding System 1 Equipment Grounding Equipment Grounding (Protective) Conductor Terminal Equipment Grounding (Protective) Conductors and Bounding Jumpers Continuity of the Equipment Grounding (Protective Bonding) Circuit ROP Numbering (untitled) (untitled) (untitled) (untitled) (untitled) Doors or Covers (untitled) (untitled) Exclusion of switching devices Equipment Grounding (Protective) Conductor Connecting Points 8. 3 Control Circuits Lighting Circuits Control Circuits and Control Functions Control circuits Control circuit supply Control circuit voltages 1 AC Control Circuit Voltages DC Control Protection Circuit Voltages Connection of Control Circuit Devices Control functions Start functions Stop functions Operating modes Overriding Safeguards Operation General Start

12 Chapter Section Subsection Sub-subsection Sub-subsubsection ROP Numbering 9. 3 Stop Emergency Operations (Emergency Stop, Emergency 9. Switching Off) 1 Emergency Stop Emergency Hold-to-Run Switching Off Controls Two-Hand Control Enabling Combined Control Start and Stop Controls Cableless control 1 General Control Limitation Stop Function Serial Data Communication Use of More Than One Operator Control Station Battery-Powered Operator Control Monitoring Stations of Command 9. 3 Protective interlocks Actions Reclosing or Resetting of an Interlocking Safeguard Exceeding Operating Limits Operation of Auxiliary Functions Interlocks Between Different Operations and for Contrary Motions Reverse Current Braking Protective Control Functions in Interlock the Event of Failure 1 General Requirements Protection Against Unintended Operation Due to Ground (Earth) Faults and Voltage Interruptions 1 Ground (Earth) Faults Voltage Control Systems Interruptions Incorporating Software and Firmware Based Controllers 1 Software Modifications Memory Retention and Protection 79-12

13 Chapter Section Subsection Sub-subsection Sub-subsubsection Software Verification ROP Numbering 10 Operator Interface and Control Devices 1 General Applicability Location and mounting 1 Control Devices Hand-Operated Protection Control Devices Position sensors Portable and pendant control stations Operator Interface Devices 1 Location of Operator Interface Devices Arrangement Foot Operated of Operator Interface Devices Push-buttons Switches Pushbutton Actuators Colors Start or On Stop or Off Emergency Stop Alternate Action Abnormal Conditions Hold to Operate Reset Legends Indicator lights and displays 1 Modes of Use Colors Flashing lights Illuminated pushbuttons and displays Rotary control devices Start devices Emergency stop devices 1 Location and Operation Types Restoration of Normal Function After Emergency Stop Emergency Stop Devices for Emergency Switching Off Actuators 5 Local Operation of the Supply Disconnecting Means to Effect Emergency Stop Location Types Deleted in ROP Actuators

14 Chapter Section Subsection Sub-subsection Sub-subsubsection Local operation of the supply disconnecting means to effect emergency switching off Displays Controlgear: location, mounting, and enclosures 11 ROP Numbering General requirements Location and mounting 1 Accessibility and maintenance Physical separation or grouping Heating effects Degrees of protection Enclosures, Doors, and Openings Spaces Around Control Cabinets and Compartments. 1 Working Space Access Machine-Mounted 12.6 Control Equipment 12 Conductors, Cables and Flexible Cords 1 General requirements General Wire Insulation Type MI Cable Conductors and Conductors Static Control Conductor Material Stranded Conductors Constant Flexing Solid Conductors Printed Wire Assemblies Shielded Conductors Shielded Insulation Conductors Wire Markings Conductor Ampacity (untitled) (untitled) (untitled) (untitled) (untitled) (untitled) Conductor / Terminal Conductor Sizing Compatibility (untitled) (untitled) (untitled) (untitled) Shielded Conductors Conductors and Cables Used for Flexing Applications 1 General Mechanical rating

15 Chapter Section Subsection Sub-subsection Sub-subsubsection 7. 3 Current-carrying capacity of cables wound on drums ROP Numbering Cords (untitled) Ampacity of Cords (untitled) Wiring practices Connections and routing 1 General requirements Conductor and cable runs Conductors of different circuits 1 Conductors supplied from Separate disconnects Connection between pickup and pick-up converter of an inductive power supply system Cables Cords Identification of conductors 1 General requirements Identification of the Equipment Grounding (protective) conductor Identification of the Grounded Circuit conductor Identification by color of Other Conductors Wiring inside enclosures Wiring outside enclosures 1 General requirements External Raceways (ducts) Connection to moving elements of the machine (new) General (Note: Cable Handling Systems is moved to this new sub subsection and the associated paragraphs and table) Interconnection of devices on the machine Plug/socket combinations 2 Cable Handling System (Note: Paragraph in ROP draft is not part of Cable Handling systems and moves to becomes paragraph in the (new) General sub subsection above)

16 Chapter Section Subsection Sub-subsection Sub-subsubsection Dismantling for shipment ROP Numbering Raceways (Ducts), Support Systems (Cable Supports), connection boxes and other boxes 1 General requirements Percentage fill of ducts Rigid conduit and fittings 1 General Requirements Metal-type Nonflexible Conduct 1 General Requirements Rigid Metal Conduit (RMC) Intermediate Metal Conduit (IMC) Electrical Metallic Tubing Rigid Nonmetallic Conduct (PVC Flexible metal Schedule 80) conduit and fittings 1 General Requirements Flexible Metal Conduit (FMC) Liquidtight Flexible nonmetallic Flexible Metal Conduit (LFMC) conduit and fittings 1 Definition (suggest removing sub subsection title and only number as paragraph that has a list) (untitled) (untitled) (untitled) (untitled) (untitled) (untitled) Wireways (Cable trunking systems) Machine compartments and Wireways Connection boxes and other boxes Motor connection boxes Cable Trays Electric motors and associated equipment 1 General requirements reserved Motor dimensions Motor mounting and compartments Criteria for motor selection 15.5 (EMT)

17 Chapter Section Subsection Sub-subsection Sub-subsubsection Protective devices for mechanical brakes ROP Numbering Direction Arrow Marking on Motors Accessories and lighting 1 Accessories Receptacles for Accessory Equipment Receptacles for Maintenance Personnel Local lighting of the machine and equipment General Supply Protection Lighting Fixtures 16 Marking, warning signs and reference designations General Safety Signs for Electrical Enclosures Functional identification Machine Nameplate Data Equipment Marking Technical documentation and Identification General Information to be provided Requirements applicable to all documentation Basic Information Installation Diagrams Block (System) Diagrams and Function Diagrams Circuit diagrams Operating manual Maintenance manual Parts list Testing and Verification General Continuity fo the Equipment Grounding (Protective Bonding) Circuit Insulation resistance tests Voltage tests Protection against residual voltages Functional tests Retesting 19.7 Xx Servo Drives Xx xx. and Motors 1 Drive Supply xx.1 xx. 2 Conductors Overload Protection xx.2 xx (untitled) xx.2.1 xx Motor Amplifier xx xx / Drive Multiple motor applications xx

18 Chapter Section Subsection Sub-subsection Sub subsection ROP xx. 3 Motor Over Temperature Numbering xx.3 Protection xx General xx.3.1 xx (untitled) xx xx Integral motor xx Thermal protection xx (untitled) xx xx (untitled) xx xx (untitled) xx xx Multiple Motor xx xx 4 Motor Circuit Applications xx.4.2 A Explanatory Conductors A B Material Enquiry form B C for the electrical equipment of machines (informative) Examples of machines covered by NFPA C 790 C. 1 Machine Tools C.1 C. 2 Plastics Machinery C.2 C. 3 Wood Machinery C.3 C. 4 Assembly Machines C.4 C. 5 Material-Handling C.5 C. 6 Machines Inspection / Testing C.6 D Technical Machines D E Documentation Device and E E. Component Designations 1 Device and E.1 F Enclosure Ratings: Type- Rating Verses Component Designations F IP-Rating F. 1 Disclaimer F.1 F. 2 Rating fo Electrical F.2 Enclosures F. 3 Type-Rating System F.3 F. 4 IP-Rating System F.4 F. 5 (untitled) F.5 G Kilowatt G Outputs with Horsepower G. Equivalents 1 Preferred Kilowatt G.1 H. Minimizing the Probability of control Function Outputs with Horsepower Equivalents I Failure H. 1 (untitled) I.1 H. 1 (untitled) I.1.1 H. 2 General I.1.2 H. 2 Measures to Minimize I.2 Risk in the event of H. 3 Failure Provisions for I.3 Redundancy H. 4 Use of Diversity I.4 H. 5 Functional Tests I.5 I 1 Reference J I. Publications 1 NFPA J.1 I. 2 Publications ANSI J.1.1 Publications I. 3 IEC Publications J.1.2 I. 4 IEEE J.1.3 Publications I. 5 ISO Publications J.1.4 I. 6 NEMA J.1.5 Publications I. 7 UL Publications J.1.6 I. 2 Informal References J.2 I. 3 (reserved) Reference for Extracts J