flatlander
Senior Member
- Location
- Diamond bar, CA , Tempe AZ
Hey does anyone know what version of the NEC the national park service is on with projects this year. The park engineer is out and I need to get my bid in.
What version of the NEC is Federal lands National Park Service
- Thread starter flatlander
- Start date
- Status
- Location
- Bremerton, Washington
- Occupation
- Master Electrician
My understanding is Feds, being under OSHA, use the general duty clause and as such would be under the 2014 NEC
flatlander
Senior Member
- Location
- Diamond bar, CA , Tempe AZ
Generally they are several NEC cycles behind current.
flatlander
Senior Member
- Location
- Diamond bar, CA , Tempe AZ
The reason I ask is because the plans don't match the spec's. I was told in the past that is because the feds use a different version of the NEC. Usually several cycles behind the current ones
One of the issues is the conductors are clearly (to me) oversized due to distance or voltage drop. However the ground wire is not at all.
As per 250.122. When does this really get invoked?
Could a 60 a 120/208 circuit/feeder be fed by #4 & #10 ground be considered standard, or is it upsized?
One of the issues is the conductors are clearly (to me) oversized due to distance or voltage drop. However the ground wire is not at all.
As per 250.122. When does this really get invoked?
Could a 60 a 120/208 circuit/feeder be fed by #4 & #10 ground be considered standard, or is it upsized?
You have to remember that under 110.14(C), for circuits rated 100A or less, or marked 14-1AWG, conductor termination temperature limitations are to be coordinated for 60?C, unless marked otherwise... and on both ends. The accepted engineering practice for this designer may be to take the default approach. As such, 4AWG circuit conductors would not be oversized. May also be the designer is taking advantage of this 'loophole'.
flatlander
Senior Member
- Location
- Diamond bar, CA , Tempe AZ
Thank you.
The interesting thing is that the plans show panel ampacity
22 amps but rate it at 60a and breaker. So is this legitimate? If at a later date they want to load it up to 50 amp at almost 300 feet this would not work IMO.
The interesting thing is that the plans show panel ampacity
22 amps but rate it at 60a and breaker. So is this legitimate? If at a later date they want to load it up to 50 amp at almost 300 feet this would not work IMO.
Not enough detail to determine if it is completely compliant. There's no violation based solely on information provided thus far.
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