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My school book has this section on blueprint symbols:




Why would you need a recessed exit sign? Isn't it better to have something like that stick out?

When would you have a low voltage switched outlet with a relay in the box?
 

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owl said:
My school book has this section on blueprint symbols: Why would you need a recessed exit sign? Isn't it better to have something like that stick out? When would you have a low voltage switched outlet with a relay in the box?
I think rec exit signs do stick out from ceiling. Some of them look like new work hi hats.
 

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Just means a clean finish from below, but all the guts and connections are up above. Like those glass ones that look nice and clean, some have a big box above the ceiling.
 
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