wiring of new residence

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bark

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Ok, after 38 years in the trade I am finally going to wire a house for my son. My question is what has changed since I last wired houses in 1979? Where does the afci circuits stop and start? It looks like all receptacles in the garage are now gfci, including the freezer which I don't understand. I think he might need a 400 amp service for the size of the house and knowing it will be entirely electric. Does a 320 amp meter base work with 2 - 200 amp main breaker panels? What am I missing here. Yes, I have taken countless code update classes, but my work has been mainly industrial and heavy commercial. Residential wiring is just a faint memory of mine. Also, I retired 3 years ago and haven't seen much with the trade since. Miss it? yes in a way, but glad it's now a memory. Thanks in advance for the help.

P.S. I'm in Washington state.
 
What code cycle are you under? I'm pretty sure that Washington state has a few local amendments too.
 
Yes a 320 amp meter base will work for 400 amps. The meter base is really a 400 amp base with a noncontinuous load but rated 320 for continuous load. For a house you will never see more than 320 amps continuous.
 
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The 2014 code and WAC
 
you'll also want a copy of your poco residential handbook.
Due to the requirment for some spaces to have afgc and gfci, many electricans are using dual functions afci gfci. and becoming more popular is the plug on neutral bus panels.
You would pick up the new requirements easliy by reading all of art 210. maybe a review of 334.
 
you'll also need a ufer ground.
WA State has some very specific requirements for protection of the GEC, but they are not in the WAC. I think they are in the nov or dec 2011 electrical currents.
 
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