electrical Install and code questions
I am wanting to run power to a new shed/workshop in the back yard. I live near Seattle and permit/inspection is through Washington L&I enforcing 2008 NEC.
My plan currently includes:
1) Replace 4 standard 15 amp breakers with 2 tandem breakers. The panel allows this, but not sure if code requires AFCI). Fill void with 20 amp 2 pole breaker.
2) Use existing (but disconnected) 4 wire 6 gauge running through 1.25" conduit in the crawlspace to route a multi wire circuit to GFCI protected disconnect box located outside the house.
3) Connect 12/3 underground cable to the disconnect box, conceal it in conduit to get it underground, route it to the out building and up through the sill plate to a double pole disconnect switch in the shed from which I will distribute it to receptacles and a wall heater
I would love feedback or suggestions.