2. 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.

3. 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.

4. 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

5. 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

6. 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)

7. 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

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 & 2.5.2)
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 & 2.5.6)

9. 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

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

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

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

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

14. 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 depending on the status of the circuit breaker energization
Provide guidance for racking circuit breakers

15. 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

16. 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.