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The term "wall cavity" usually refers to the space between studs. Outlet boxes are usually fastened to one side of a stud or the other. Sometimes they are fastened to a crossbar, whether metal or wood, so they can be placed anywhere within the space. There are height limitations in order to count as required outlets but may be placed anywhere you need one. They are called convenience outlets and my friends often hear me say that if one isn't convenient, there aren't enough.
If by "wall cavity" you mean a completely walled off portion of a building with no access, something that sometimes happens in commercial buildings, then no, it is not legal. You must have access to any splices in the circuit, which includes end of the line.
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What is the Length of wall requiring electrical outlet?
any wall 2' or over
What is the definition of duplex outlet?
Electrical wall outlet having two plug receptacles.
How far from a door can an electrical outlet be installed?
As close as you want. You must insall an outlet a minium of every 12 feet of wall space. If the wall is smaller that 24" it does not require an outlet.
How do you insulate an electrical outlet?
If the outlet is on an outside wall there is a plastic boot that goesaround the outlet. The purpose of this boot is to keep the vapour barrier intact. The edges of this boot are then taped to the wall vapour barrier to make a complete air seal. The insulation goes behind the outlet boot which allows the wall R value to remain the same as the rest of the wall.
Why only every other electrical outlet works on same wall?
For me five..ewanq nalang sa iba ...08:-)
