Naval Safety Center EL Reps

1. Naval Safety Center EL Reps EMCM (SW/AW) Jim Burke jim.burke@navy.mil EMCM (SW) Matt Kerridge matthew.kerridge@navy.mil Comm: (757) 444-3520 Ext 7144, DSN 564 Prefix

2. NSTM 300 REV 9 REV 7 released APR 2005 (Pre-NIMITZ arc flash incident) Work Groups began MAR 2009 (RENTZ & REAGAN Electrocutions in NOV 09 and FEB 10) 1 FEB 2012: REV 8 Released (Found Typos in IVV Table) 1 MAY 2012 : REV 9 Uploaded to TDMIS JULY 2012: Implemented by TYCOMs (with exception of new 12 cal PPE)

3. PREMISE • ALIGN AS CLOSELY AS POSSIBLE WITH NFPA 70E • INCORPORATE ARC FLASH THEORY AND PPE • UTILIZE FLEET INPUT • MUST FIT ALL AFLOAT PLATFORMS AS AN UMBRELLA INSTRUCTION

4. 300-2.1.1 GENERAL. This chapter provides the necessary framework to perform work on electrical equipment in a safe manner. It is the responsibility of COMMANDING OFFICERS to ensure such guidance is clearly understood and strictly enforced.

5. However, no guidance, no matter how exhaustive and thorough, can substitute for proper deckplate level supervision and an alert and questioning attitude on the person’s part. Ultimately, every individual, from the Commanding Officer to the persons performing the work, has not only a role to play but also a personal responsibility in safety. Electrical safety is an ALL-HANDS evolution.

6. 300-2.1.1.1 Personal Responsibility. • Personnel must understand the rules and regulations involved with electrical systems • Responsibility of the chain of command to ensure that • persons are properly trained and qualified • knowledgeable of this chapter and any other applicable technical manuals and operation manuals.

7. 300-2.1.1.2 Contradictory Guidance. Type Commanders (TYCOMs) and individual commands may issue local instructions that clarify the requirements of this manual but shall not issue any guidance that is contradictory to this manual without NAVSEA approval.

8. 300-2.1.1.3 Chapter 300 Overview. PARAGRAPH 300-2. - 300-2.3 General safety information PARAGRAPH 300-2.4 - 300-2.8 • working on energized equipment • exceptions for working on energized equipment • damaged equipment • portable equipment • systems within medical spaces PARAGRAPH 300-2.9 Rescue actions for victims of electrical shock (& CPR Training Requirements)

9. 300-2.1.1.3 Chapter 300 Overview. APPENDIX G Supplemental discussion of electrical safety including illustrative examples APPENDIX H Information on electrical/electronic workbenches APPENDIX I Personnel Protective Equipment (PPE) and has applicable supply information for electrical safety equipment

10. New Terms Defined ARC FLASH Situation where electrical current passes through air gaps between ungrounded conductors or between conductors and grounded components. May occur from insulation breakdown where the electrical current jumps an air gap to a conductive surface Inadequate separation of a worker from the energized part The use of uninsulated tools Two major hazards of arc flash 1) arc temperature 2) incident energy

12. PPE is Effective

13. ARC BLAST Occurs when the severity of an arc or short circuit current causes destructive heating and explosive vaporization of both the surrounding air and the metal in the current path. The pressure wave can exceed thousands of pounds per square inch, injuring workers by knocking them down or collapsing their lungs The sound of the blast can exceed 160 dB

15. 4160 VAC ARC BLAST

16. Arc Flash Burn (3rd Degree)

17. PPE Rated by Cal/Cm2 • Above 30V to 300VAC: 12 cal/cm2 faceshield. • Above 300V to 1000 VAC: 12 cal/cm2 (coveralls, faceshield) • Above 1000 VAC: 40 cal/cm2 (hood, body suit). • ALIGNS WITH NFPA 70E AND CIVILIAN STANDARDS

22. Flash Protection Boundaries (FPB) Unobstructed distance from exposed energized circuits within which unprotected skin could receive a second degree burn if an electrical arc flash were to occur All personnel, required to be within the FPB for initial voltage verification (IVV), circuit breaker racking, fuse removal/replacement, or maintenance, shall wear the PPE identified in Table 300-2-1a, Table 300-2-1b, Table 300-2-2, and Table 300-2-3

23. NAVSEA Flash Protection Boundary requirements 4 feet is applicable to circuits with rated voltages between 30-1000 volts 11 feet is applicable to circuits with rated voltages greater than 1000 volts up to 5000 volts 13 feet is applicable for voltages greater than 5000 volts It is important to understand that personnel shall not be within the FPB without the appropriate PPE

24. 300-2.5.1 INITIAL VOLTAGE VERIFICATION (IVV). Less than or equal to 30 volts (low risk). category includes circuits rated less than or equal to 30 volts that have been deenergized. Greater than 30 to less than 1000 volts (low risk). category describes situations when verifying the equipment deenergized poses a low risk to personnel • Single power source equipment (a single-speed motor, an oven, a string of lights, etc.). • Multiple power source equipment as designated by the Commanding Officer in writing to be low risk (e.g., a single-speed motor controller that also has an alarm circuit, a fan with two power supplies, etc.)

25. 300-2.5.1 INITIAL VOLTAGE VERIFICATION (IVV). Greater than 30 to less than 1,000 volts (medium risk). category describes situations when verifying the equipment deenergized poses a medium risk to personnel. • Load centers and switchboards rated less than 1000 volts. • Newly installed equipment, until the electrical safety isolation has been verified. • Multiple power source equipment that has not been designated as low risk by the Commanding Officer • Damaged equipment as described in paragraph 300-2.6. High Risk. This category describes situations when verifying the equipment deenergized can pose a higher risk to personnel. • Equipment and systems that are rated 1000 volts or greater. • Equipment and systems that PMS or equipment technical manuals designate as requiring greater than 12 cal/cm2 arc flash PPE to verify deenergized.

27. 300-2.4 ENERGIZED WORK GENERAL REQUIREMENTS.

28. 300-2.4.2 ENERGIZED WORK REQUIREMENTS. Ensure a safety brief is conducted, including supervisory personnel, prior to commencing work Never work on energized electrical or electronic equipment alone person trained in first aid for electrical shock shall be present as a safety observer Minimize work on energized equipment….. should only be done when absolutely necessary • Person shall be electrically safe • shall not wear watches, rings, chains, metal articles • or loose clothing that might accidentally contact energized parts • Clothing and shoes shall be as dry as possible Insulate the deck or standing surface from ground Use only one hand to do the work, if practical

29. 300-2.4.2 ENERGIZED WORK REQUIREMENTS. Wear properly rated rubber gloves A protective, impact-resistant, arc flash-rated faceshield per Appendix I shall be worn A protective, arc flash rated coat, overalls, hood, and/or coveralls (arc flash suit), in accordance with Appendix 300-I shall be worn when applicable per Table 300-2-1a, Table 300-2-1b, Table 300-2-2, and Table 300-2-3 Minimize access to the energized work areas to keep unauthorized personnel at a safe distance. per Table 300-2-1a, Table 300-2-1b, Table 300-2-2, and Table 300-2-3. Use only electrically insulated tools with an electrical insulating material that covers exposed metals For work greater than 300 volts, a non-conducting safety line or equivalent shall be attached

30. 300-2.4.2 ENERGIZED WORK REQUIREMENTS. Take the following extra precautions when the nature of the work is particularly hazardous and provides increased risk of contact with an energized conductor. Station personnel with communications, as necessary, so that the circuit or switchboard can be deenergized Personnel shall be properly supervised while performing particularly hazardous work. The supervisor shall not be involved in the actual work Provide insulated barriers between the work and any energized metal parts adjacent to the work area

32. 300-2.5.3 FUSE REMOVAL AND REPLACEMENT. 300-2.5.3.4 Exceptions For Critical Equipment. Fuses should always be removed from a verified deenergized panel. However, removing or replacing fuses in energized circuits is permitted if deenergizing the circuits to the line side fuse clips would require shutdown of critical equipment. The Commanding Officer will designate which critical equipment is necessary for safe ship’s operation or performance of the ship’s mission.

35. CKT BREAKERS AND DISCONNECT LINKS 300-2.5.4.3.3 Energized Enclosure Precautions. There may be instances where a circuit breaker is racked-in/out from an energized switchboard. This evolution can expose the technicians to both electrical safety and arc flash hazards and should only be done when it is not practical to deenergize the switchboard. Commanding Officer, or designated representative permission is required. Follow the requirements of Table 300-2-3 for electrical safety and arc flash PPE. For circuit breakers in switchboards rated greater than 1000 volts, this is an approved exception to the prohibition against work on energized equipment greater than 1000 volts. 300-2.5.4.4 Disconnect Links Operation. Prior to operating disconnect links, verify both sides are deenergized per the applicable portions of paragraph 300-2.5.1.

38. 300-2.5.5 VISUAL INSPECTIONS. There may be times when visual inspections of non-damaged equipment are required defined as an inspection of energized equipment, circuitry, or components within an enclosure with no physical contact made with energized components shall not break the electrical safety plane. Imaginary plane formed by the opening of an electrical enclosure, when the door is opened or cover removed If electrical components are mounted on the door, then the plane includes the arc formed by the doors edge as it swings open.

39. 300-2.5.5.2 Requirements. Visual inspections of energized equipment rated 1000 volts or above is not permitted unless approved by NAVSEA instruction. Commanding Officer’s, or designated representative’s, permission is required unless the inspection is scheduled as part of routine maintenance, inspections, or as part of tag-out validation. If scheduled, the applicable watchstanding supervisor’s authorization shall be obtained prior to accessing energized panels (i.e., EOOW, PPWO, CEW, as applicable). Remove all metal and loose clothing. Consideration should be given to having two persons present during the inspection, especially if the equipment is in a hard to access location or unmanned space. Erect a barrier at least two feet from the electrical plane of the equipment. The barrier may be a person, physical barrier, rope, or any other means to prevent access to the immediate area around the equipment.

40. 300-2.5.5.2 Requirements. Do not take uninsulated tools or equipment inside this boundary. This requirement is not applicable for thermal imaging cameras in order to gain access to all internal components for thermal imaging within the enclosure At no point shall any portion of the inspector’s body or any tools come within the electrical plane of the equipment. Caution must be taken to prevent being in a position where loss of balance or tripping could cause the person to fall into the energized parts.

41. 300-2.6.1 DAMAGED ELECTRICAL EQUIPMENT. A maximum degree of alertness and care is required to work on damaged equipment. When working on electrical equipment or circuits that have been damaged (i.e., equipment condition that could cause injury to personnel, or further damage to the equipment, if used; usually caused by fire, steam leak, blunt force, collision, battle damage, etc.), observe the general electrical safety requirements of paragraph 300-2.3 and the requirements for maintenance of energized circuits of paragraph 300-2.4.2 until it is verified that all portions of the circuit, including exterior of electrical enclosures, are isolated and deenergized.

42. 300-2.6.2 EQUIPMENT THAT CAUSES A SHOCK. If an electrical component has caused a shock, that component should be deenergized immediately; do not operate the equipment until a determination of whether the cause of the shock was equipment damage/malfunction is completed. If it is determined that shock was caused by equipment malfunction, then the equipment shall be considered as damaged and handled per paragraph 300-2.6.1 until repaired. If it is determined the shock was a result of personnel error, improper test leads, etc., then the equipment does not need to be treated as damaged gear, but instead should be evaluated by qualified personnel prior to restoring for unrestricted use.

43. 300-2.6.3 INOPERATIVE OR MALFUNCTIONING EQUIPMENT. Inoperative or malfunctioning equipment is equipment or circuits that are not operating properly, (abnormal noise, abnormal indication or response, etc.), but has not suffered a casualty. This equipment does not need to be considered as damaged equipment for repair/operations, but should undergo troubleshooting and repair as soon as operationally practical. If multiple indications point to potential electrical equipment damage, such as ground indications with abnormal current or voltage indications or smoke and/or acrid odor, then the equipment should be treated as damaged per paragraph 300-2.6.1.

44. 300-2.6.4 WETTED EQUIPMENT Equipment may become wetted due to leaks, flooding, fire fighting, etc. and must be dried off. The risk of a shock from gear wetted on the outside is low, but should be considered prior to wiping off water. At a minimum, rubber gloves should be worn while wiping off the equipment. If installed, a ground detector should be used to monitor for grounded equipment before and after drying the equipment. If it is determined that the equipment has internal wetting, then equipment should be completely deenergized, inspected, dried internally, and restored to proper operating condition prior to re-energizing.

45. 300-2.7.3.5.4 Mounted Mobile Electrical Equipment Mobile electrical equipment shall be receptacle connected if the equipment is not permanently mounted and has a power cord less than 25 feet long. If the mobile equipment is permanently mounted and the power cord is less than 25 feet, it may be either receptacle-connected or hard-wired. If the power cord must be more than 25 feet long, the equipment must be permanently mounted and hard-wired.

46. 300-2.7.6.2 Approval of Personal Electric Gear. 300-2.7.6.5 Personal Entertainment Gear. Personal electronic equipment such as radios, alarm clocks, televisions, game systems, DVD players, musical instruments, and amplifiers that do not meet the requirements of paragraph 300-2.7.3.3, paragraph 300-2.7.3.4, or paragraph 300-2.7.3.5 shall meet the requirements of paragraph 300-2.7.3.6.4. 300-2.7.6.6 Personal Irons, Coffee Pots, Hair Dryers, and Curling Irons. Personal irons, coffee pots, hand-held hair dryers, and curling irons shall meet the provisions of paragraph 300-2.7.3.1 through paragraph 300-2.7.3.5.4 and shall be provided with a power cord in conformance with the requirements of paragraph 300-2.7.4 through paragraph 300-2.7.4.3. Final acceptance or rejection is at the discretion of the Electrical Safety Officer.

47. 300-2.7.6.8 Prohibited Personal Gear Personally-owned equipment such as fans, extension cords, high intensity lamps, reading lamps, electric blankets, heating pads, electric power-driven tools (except those specifically used as hobby tools), heat/sun lamps, hot plates and griddles, microwave ovens, portable extension lights, electric heaters, refrigerators, air conditioners, and immersion-type water heaters are prohibited from being introduced and used onboard ship. Adequate government-owned equipment is provided to meet the needs associated with these items.

48. 300-2.9.3 CPR. Each ship shall have a certified American Red Cross/American Heart Association CPR instructor on board. At least 50 percent of all electrical/electronics′ associated ratings shall be certified in CPR. All electrical/electronics′ associated ratings shall conduct annual training in CPR training must be provided by a certified CPR instructor.

49. New 2010 BLS-HS Standards CARDIOPULMONARY RESUSCITATION (CPR) Place victim flat on their back on a firm surface 1. Check for response, check for breathing, call for help (911). Give 30 chest compressions 2 inches deep. 2. Give 2 rescue breaths, and then continue with another cycle of compressions. 3. Continue with the 30 compressions to 2 breaths. Continue until help arrives.

50. 300-H.6 REDESIGNATION OF ELECTRICAL WORKBENCH TO MECHANICAL WORKBENCH. In the event that a workbench is no longer required (i.e., existing in a non-electrical work re-designated work space), work benches may be downgraded with approval and direction of the Commanding Officer and approved Departure from Specification. (CHANGE FROM ELECTRICAL OFFICER AS ONLY APPROVAL OF CHANGE) EVERY SHIP MUST HAVE AT LEAST ONE. ALSO- WORDING UNDER DISCONNECT SWITCHES HAS CHANGED- REMOVING THE TERM “PUSH BUTON” TO ALLOW FOR ROTARY SWITCHES.