How to size service conductors | Information by Electrical ...
2024年11月21日 · I don't understand why that rule is allowed. If it is a single service you couldn't do that. In fact, a single service of 200 amps requires 2/0 copper but the load calc for a 200 and a 100 amp service may actually require a conductor smaller than 2/0 or the same size. Unless I am missing an exception somewhere
Splicing service entrance conductors | Information by Electrical ...
2005年7月26日 · Re: Splicing service entrance conductors 230.33 Spliced Conductors. Service-lateral conductors shall be permitted to be spliced or tapped in accordance with 110.14, 300.5(E), 300.13, and 300.15. 230.46 Spliced Conductors. Service-entrance conductors shall be permitted to be spliced or tapped in accordance with 110.14, 300.5(E), 300.13, and 300.15.
Copper vs aluminum service entrance conductors
2015年3月30日 · the wire is fully serviceable, and the insulation is the same as copper insulation. the only way i'll terminate aluminum feeders is with a hypress. then i use a UL approved direct burial heat shrink 600 volt material to seal the hypress to the insulation. to land on breakers, i'll use a finger lug hypressed onto the wire. if there isn't room
Conductor Size for 320A/ 400A Service | Information by Electrical ...
2021年8月12日 · (1) For a service rated 100 through 400 amperes, the service conductors supplying the entire load associated with a one-family dwelling, or the service conductors supplying the entire load associated with an individual dwelling unit in a two-family or multifamily dwelling, shall be permitted to have an ampacity not less than 83 percent of the ...
Service wire size with 83% rule | Information by Electrical ...
2020年7月6日 · I have an existing 150 amp panel with a 2/0 AL. wire. Appliances were added and the new load demand on the service is 140 amps. So do you apply it to 150 x .83= 124.5 amps or 140 x .83= 116.2 amps. I am trying to identify If I can keep the 150 amp panel with a 2/0 AL. wire or I need to upgrade to 175 amp 3/0 AL wire
residential service wire size | Information by Electrical Professionals ...
2010年5月2日 · If the existing service is 120/240 3-wire then you may still be able to use the existing service to feed the two panels. If the panels both have 120 Volt loads you could balance the panels. One ungrounded conductor and common neutral would feed one of the 200 A panels and the other ungrounded conductor and common neutral would feed the other ...
150 amp service sizing | Information by Electrical Professionals for ...
2010年5月14日 · I am assuming you are talking about as residence as the wire size is different for residence. Look at t. 310.15(B)(6) for the wire size and then go to the back of the book and look at Annex C Tables. If the riser extends beyond the roof and will support the overhead lines then it must be rigid, otherwise, PVC, emt rigid etc will work.
Minimum service drop height. | Information by Electrical …
2012年3月6日 · clearances (under conditions of maximum sag) at any point along the span of the service drop conductors. These clearances apply to company-owned service drops meeting NESC rule 230C3 (triplex, quadraplex, duplex, or parallel-lay conductors). For other companyowned service conductors (open wire, bare wire) refer to …
Wire size for an 800 amp serice (paralled)
2017年3月30日 · I had an ol' friend and 30 year electrician who is now 49% owner in a GA. company that does a lot of work in NC at distribution hubs ask me about wire size to the service. I sent him to table 310.15 and the 75 degree column. It was different that the prints had specked for the run 600MCM vs...
Tapping Service Conductors | Information by Electrical …
2015年5月21日 · If the taps were outside the building, and prior to the service point, then it might be OK, and this is a common installation to feed separate meters. But then the 350 KCM wires wouldn't be service conductors, and you wouldn't be tapping the service conductors. Edit: If the 350's fed a panel with (3) 200A breakers, that would be legal.