Conductor Size for 320A/ 400A Service | Information by Electrical ...
2021年8月12日 · If you are installing a 400 amp service then you can use conductors based on the table in art. 310 Not sure but if I were doing a calc I would use the 83% for the 200 amp service for the house and 200 amps for the shop which means you …
Wire size for 400 Amp 3 phase service - Electrician Talk
2019年4月8日 · 600AL is 340 amp conductor. Using 600AL on a service with single main 400 amp OCPD is noncompliant even using the "round up" rule as 350 amp OCPD's are available. A person needs to select a conductor size with an ampacity past 350 amps to be able to select the next size up 400 amp OCPD assuming the calculated load is less than the conductor ...
How to calculate parallel runs sizing - Mike Holt's Forum
2021年3月25日 · 800 amp feeder you want to use #3/0 which is a 200 amp conductor 800/200=4 sets. Switch to 600 kcmil which is a 420 amp conductor 800/420=1.9= 2 sets. In your example you want to use 2 sets for 400 amps that means that each set needs to have an ampacity of 400/2=200 amps or minimum size of #3/0.
grounding a new 400 amp service | Information by Electrical ...
2014年9月18日 · i have just finished roughing in a new 7500 foot house and i am preparing to ground the 400A service. i am uncertain about the wire size for the cold water GEC. here are the basics...main panel has two (2) 200A main breakers, separately fed from the meter side of the all-in-one, side-by-side panel. one feeding the main panel and one feeding a ...
Neutral Conductor Sizing & 310.15(B)(7) | Information by Electrical ...
2011年10月9日 · Okay take this a step further. Table 310.15(B)(7) allows se cable into the equation. Does it state that se cable must have all the same wire sizes. With your thought process if I use this table then I cannot undersize a neutral conductor at all simply because the table states 200 amp-- 2/0 copper conductors.
Wire size for an 800 amp serice (paralled) | Information by …
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...
400 amp service parallel conductors | Information by Electrical ...
2006年11月9日 · Table 310.15(B)(6) lists the conductor size for a 400A dwelling service and feeders as 400 kcm copper or 600 kcm aluminum. Did you mean that the inspector is requiring 600 kcm copper to feed a 400A service?...or 400 kcm copper?... or 600 kcm aluminum? Table 310.16 lists the ampacity of 3/0 copper as 200A (75C).
400amp underground residential service conductor size
2013年3月13日 · OK, so see if this follows. Table 310.15(B)(7) Allows me to use 400kcmil USE copper for a 400 amp underground residential service which in table 310.15(B)(16) would have an amperage rating of 335 amps. Now using the amperage rating of 2/0 USE, which is 175 amps, and running it in parallel would give a total ampacity of 350 amps.
wire sizing 400 amp residential | Information by Electrical ...
2020年12月4日 · 400 amps * .83= 332 amps conductor- which is necessary for the 400 amp service on a residence. You would have to de-rate 80% because of the number of conductors in a conduit. 4/0 aluminum is good for 205 amps at 90C--- 205 * 2= 410.... 80% of 410= 328 which is what Wayne had.
400 amp residential service water line bonding - Electrician Talk
167800 * 2 = 335600 next standard size wire is 350,000 which is 350Kcm. Table 250.66 allows #2 grounding electrode conductor. Now if you had run just a single set such as 500 kcm (380 amps) at 75C then you would have needed the 1/0.