I plan to hook up a pair of outside flood lights on the house and have a
question about what size wire to use.
There are two fixtures, for a total of four, 150 watt bulbs and I plan to
use three 4-way switches.
How do I describe the wire that I need to use for this when I go into Home
Your help will be appreciated.
You'll need 14/2 wire cause you're pulling 5 amps at 120 volts (600 watts).
If you're running that wire back to your breaker box, then you'll also need
a 15 amp single pole circuit breaker.
If you're tapping into an existing circuit (say at one of the switches) your
total amp draw on that circuit should not exceed 12 amp (80% of a 15 amp
Finally, you'll need 2- 3 way and 1 - 4 way switch for your setup. A 4 way
must be placed between the two 3 ways in the circuit.
If this doesn't compute, you'd better call an electrician.
You made two mistakes.
You responded to Tom instead of the OP, and you contradicted Tom who was
If he is taking it off a 20a circuit, he needs #12; it doesn't matter that
the lights only need #14.
Match the wire to the load limiter (i.e. fuse or circuit breaker) not
the demand. If, in the future, some unknowing person attaches a 25A
widget to the line, you want the fuse/circuit breaker to blow, not
the wire. Design for the possible, not the probable.
No need to apologize, that was just the AHR troll, "I-zheet M'drurz",
spewing his usual hatred towards folks who try to give the right info.
Here's a website that should help:
Self-appointed internet armchair electricians like Tom "Firebug" Pendergast
avoid the websites that give good electrical advice like the plague, unless,
of course, it's unmoderated like most of Usenet.
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