4 KV circuits
- Thread starter rpmlube
- Start date
- Status
- Location
- Illinois
- Occupation
- retired electrician
Re: 4 KV circuits
I'm not aware of a code restriction that would prevent you from making that installation. I'd look at the conduit run from the cable pulling standpoint before doing this. There is a large difference in the outside diameter of the two different size conductors and there is risk of damage to the smaller one with a long pull and a couple of 90s.
Don
I'm not aware of a code restriction that would prevent you from making that installation. I'd look at the conduit run from the cable pulling standpoint before doing this. There is a large difference in the outside diameter of the two different size conductors and there is risk of damage to the smaller one with a long pull and a couple of 90s.
Don
frenchelectrican
Senior Member
- Location
- Nord'est Wisconsin et Paris France
Re: 4 KV circuits
what type med. voltage wire you are planning to use for ??? and genrally my experince i like to keep them seperate due diffrent diametr cable and length as what don say it make a diffrence at 90 sweep ell . it can make a diffrence
merci, marc
what type med. voltage wire you are planning to use for ??? and genrally my experince i like to keep them seperate due diffrent diametr cable and length as what don say it make a diffrence at 90 sweep ell . it can make a diffrence
merci, marc
Re: 4 KV circuits
Thanks guys for the input, the type of wire we use is generally Okoguard-okoseal Type MV-105. That has the 105C rating 100% and 133% Insulation level, shielded. I know that the two different size wire can play a problem in the pull, but not that big of one. Mostly I was trying to find out if you can put two 4KV circuits in one conduit
Thanks guys for the input, the type of wire we use is generally Okoguard-okoseal Type MV-105. That has the 105C rating 100% and 133% Insulation level, shielded. I know that the two different size wire can play a problem in the pull, but not that big of one. Mostly I was trying to find out if you can put two 4KV circuits in one conduit
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: 4 KV circuits
Yes. But be sure to de-rate the conductors per Table 310.15(B)(2)(a).
Yes. But be sure to de-rate the conductors per Table 310.15(B)(2)(a).
- Location
- Lockport, IL
- Occupation
- Semi-Retired Electrical Engineer
Re: 4 KV circuits
Oops!
You?re right, and I have to retract my previous response. I still think that to run more than one 4kV circuit in the same conduit is not forbidden by the code. But there is no table in the series of 310.67 to 310.86 that applies to six conductors in a single conduit. That places you in the realm of ?engineering supervision,? per 310.60(D).
Oops!
You?re right, and I have to retract my previous response. I still think that to run more than one 4kV circuit in the same conduit is not forbidden by the code. But there is no table in the series of 310.67 to 310.86 that applies to six conductors in a single conduit. That places you in the realm of ?engineering supervision,? per 310.60(D).- Status