| Before the addition to my house I often was at a loss for anything
to do with electricity; less than stellar performance in 3rd quarter
physics also did the trick. Sure I could change a bulb well enough but
any thing to do with wiring the real thing and it was truly a shocking
affair as far as I was concerned.
So I watched the guys pulling 14 guage 2-wire electrical wire from
all the new outlets and switches back to by whatever path possible
to the electrical panel. That in itself was awe inspiring.
My work shop in the garage was on the same cicuit as the washer,
dryer, the toaster and microwave, oh and the kitchen lights for
that matter. But the new addition would place everything on it's
own circuit...I thought I needed another plug in the garage.
So the guys said they would run an extra line from point A to point
B over there on my bench. I wanted a quad with proected armor cable
BLAH_BLAH_BLAH and they said wold beyond the scope of what they were
willing to do as a freebie for me.....and I appreciated what they would
have done but me, VD, could not be denied for lack of knowledge and
a universe of resolve.
My original plan was a simple outlet in the middle of the bench. Then
I said I am going to the library. I found an ORTHO book on basic
wiring and another book called wiring basics which talked about
basics and the NEC (national electric code).
One thing led to another. For a garage, instead of an ordinary 15amp
circuit run with 14gauge/2 wire I would want to run 12gauge/2 wire that
would handle 20 amps. A 15 amp circuit is comfortable with no more than
8 outlets and about 1440 watts (120volts x 15amps minus 20% (margin
of safety)= to give a safe capacity for your circuit. The 20amp circuit
is safe to about 1920watts. So I bought 100 feet of 12/2 and 3 20amp
outlets, 30 feet of 1/2 conduit, offset connectors, concrete anchors,
hangers, 18.8 cu. in handy boxes, and hanging staples. I owned a tubing
cutter altrhough you can use a hack saw.
I drew a rough sketch of what I wanted in workbench outlet(s) [more
on that later]. I then mounted my boxes on the wall and started at the
end run. I measured the distance to the next box cut conduit and connected
the boxes and supported the lot with hangers. I pulled a length of the
wire through to connect the 2 boxes leaving about 8 inches hanging out
of each. The next box was connected with (2) 90 degree bends ( if you
have more than 360 degree of bend you have to use a pulling elbow and
but you want to avoid this situation. Similarly I pulled a length of
wire through to connect this set of boxes leaving 8inches or so and
coiling them back into the box(s) for later.
Now the Big MOMA. I started back at the panel an loosely pulled the
wire back towards the garage. Building codes in your local vary, but
you essentially want to pull your wire and support them and protect
them from stuff. drilling holes through joist, guard strips and staples
is a fine way to accomplish tihs. Pulling the wire through the conduit
is tricky and there are a number of conventions the electrical universe
uses to arrive at this but I won't go into it in any detail here.....and
at the end i pulled the wire and left 8 inches.
For a garage setting you want to protect yourself against ground faults-shocking
yourself to death byt installing at the first outlet or at the breaker
a GFCI (ground fault cicuit interupt) device.This is a sensitive device
that senses small changes in electrical current to small to trip the
actual circuit breaker but strong enough to ruin you day. A typical
GFCI with detect a current change in potential of as little as 4-6 milliamps
and will shut cut the circuit in as little as 1/40th of a second. Choice
is yours.
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