BACKGROUND NSTM 300 was completely re-written to clarify and update requirements for today’s increasingly complex shipboard electrical systems. The enclosed training introduces the Fleet to major changes regarding electrical safety and arc flash protection, but is not intended to replace more detailed electrical safety training.

BACKGROUND In 2009, a team including COMNAVAIRFOR, COMNAVSURFOR, COMNAVSUBFOR, NAVSEA, Navy Shipyards, Naval Safety Center, and the Fleet were tasked with this re-write. Local instructions (SSORM, CNAF Nuc Notes, standing orders, ect.), as well as civilian requirements (National Fire Protection Association 70E, OSHA standards, NIOSH standards, etc.) were used and adhered to as much as operationally possible in a military environment during this effort.

NSTM 300 LAYOUT Section 1: Sources of Information Section 2: Electrical Safety Precautions Section 3: Electrical Insulation Section 4: Maintenance of Electrical Equipment Section 5: Recondition of Electrical Equipment After Contamination by Seawater, Lithium Bromide, Oil, Carbon Dust or Combination of these Materials

NSTM 300 LAYOUT App A: Electrical Insulating Materials App B: Certification Procedure for Providing Motors with a Sealed Insulation System App C: Certification Procedures for Refurbishment of Submarine Ship Service/400 Hz Motor-Generator Sets App D: Banding Armatures with Resin-Treated Fibrous-Glass Banding Tape App E: Trickle Method of Shipboard Motor Repair

NSTM 300 LAYOUT App F: Quality Assurance Inspection Procedures and Information for Application of Insulating Varnishes to Navy Electrical Equipment App G: Safety Supplement App H: Electrical/Electronic Workbenches App I: Safety Equipment App J: Technical Manual Deficiency/Evaluation Report (TMDER)

REV 8 Training Not meant to be electrical safety training, but instead covers changes to electrical Saftey requirements presented in Rev 8 Includes new definitions included in Rev 8 Introduces tables to assist operators included in Rev 8 Clarifies requirements included in Rev 8

REV 8 Training The training is comprised of seven parts: 1: Overview 2: Electric shock and arc flash (Sec 2.1 & 2.2) 3: Electrical work and energized work (Sec 2.3 & 2.4) 4: Initial voltage verification (Sec 2.5.1 & 2.5.2) 5: Fuse removal and replacement (Sec 2.5.3) 6: Circuit breaker removal and replacement (Sec 2.5.4) 7: Visual inspections, damaged/inoperative gear, < 30 volt control, covered/wetted gear (Sec 2.5.5 & 2.5.6)

VOLTAGE CATEGORIES All voltages in these presentations are alternating current (AC) root mean square (RMS) or as direct current (DC) unless otherwise specified Rev 8 establishes voltage control categories: ≤ 30 volts >30 volts to < 1000 volts ≥ 1000 volts

PART II Clarifies and updates electrical safety requirements Introduces: Arc flash Arc blast Flash protection boundary

PART III Defines electrical work Discusses requirements for a qualified electrical worker Breaks down energized work requirements based on different voltages

PART IV Discusses initial voltage verification Introduces risk categories Defines stray voltage and how to eliminate it PPE requirements based on Table 300-2-1b How to verify meter operability Defines safe to work checks

PART V Provides guidance for removing/installing fuses PPE for fuse removal/installation based on TABLE 300-2-2 Introduces the different categories of fuse removal/replacement depending on fuse panel type

PART VI Defines two basic types of circuit breakers, fixed mounted and draw-out type Discusses the different positions of a draw-out type circuit breakers PPE based on TABLE 300-2-3 depending on the status of the circuit breaker energization Provide guidance for racking circuit breakers

PART VII Provide guidance for performing visual inspection of energized equipment Discusses adequately covered energized components ≤ 30 volt controls Damaged and inoperative gear Wetted equipment

SUMMARY Training is provided to assist the crew in training on NSTM Chapter 300, Revision 8; it is not intended to replace electrical safety training Introduces new definitions, requirements, voltages categories and tables.