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 ELECTRICAL STANDARDS (page 1 of 2)
Director's Orders (DOs)
Building Codes
- NFPA Codes and Standards, but not NFPA 5000
- NESC National Electrical Safety Code
- NEC 2005
Directives, Standards, and NPS Guidelines
- IEEE - Standards
- EIA/TIA Standards 568 & 569
- IESNA Illuminating Engineers Society of North America
Professional Guidance
Load Requirements:
- NEC 2005
- Nameplate/Manufacturers Data
- 25% minimum spare capacity typical for future expansion
Utilities:
- Underground distribution as much as possible
- NPS prefers not to own & operate utilities
Telecommunication:
- EIA/TIA Standards, see above
- Cat 6 Cabling - (2) per 3/4" conduit; (1) Data, (1) Voice per each voice / data outlet (typical)
- Telephone - Meet Local Phone Company Requirements
Conduit:
- Site specific, in general Schedule 40 PVC for underground
- Minimum branch circuit conduit size = 3/4"
- Provide conduit for telephone and data wiring
(minimum size 3/4")
- See table below
Power Wiring:
- THWN / THHN
- Underground - THWN / XHHW
- No MC or AC type cabling in walls in new construction
- No surface mounted MC or AC type cabling where non-flexible raceway can be used
- Copper conductors
Overcurrent Protection:
- Breakers preferred for reset capability
(sizes 15 amperes or greater)
- Fuse selection shall comply with NEC requirements and equipment manufacturers recommendations.
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