Howdy all. Looking for some info on running a power tap from my house
to the shop and garage.
I'm planning on running a 220 drop from the house box to the shop and
then on to the garage underground. Probably 25 feet between the house
and the shop, and then 40 or so to the garage.
What advise, hints, shortcuts, gauge wire, conduit suggestions do you
I realize I'll probably have to run anything through my local inspector
before completing it. I'm in Pennsylvania.
If you happened to catch an earlier post of mine I have a 20" planner
and several other items that are gonna be needin power moving to my
How many amps feed do you plan to use?
After you get your trench dug, I recommend pulling the wire in the
conduit before you put it in the ground, #3 aluminum and # 6 copper is
kinda hard to pull when its in the ground. If you don't do this at
least put the largest pull string in the conduit before burial.
Find out what your grounding requirements are for your area. Chances
are you will be needing to install a ground rod at your building. This
actually is nice since you won't have to pull a separate ground from
your house so 1 less wire to buy.
Oversize your electrical feeder to your shop and size the breaker in
your outside box for the over sized wire.
The breaker in the *house* should be sized for the feeder wire. The
breaker in the *shop* should be sized for the *shop* wiring.
100 amp breaker in house, feeds...
wire capable of carrying 100 amps, connected to...
60 amp breaker in (or outside depending on code) shop, which protects...
circuit breaker panel box rated for 60 amps, which contains...
20 amp breaker, connected to...
wire/receptacle rated for 20 amps.
Breakers are always sized for the things they can disconnect power
from, not the things between them and the power company.
(All the more reason why *my* advice is to visit the inspector
*before* starting anything)
I ran 3 electrical wires in one conduit and a cable [for TV]and phonelines
in another conduit a water line in a separate conduit and a soft copper line
for natural gas . All were buried 18" below ground and the total length was
upward of 100yards. as the previous poster mentioned it is hard to pull
wires just use plenty of electrical " soap" in the conduits. I got the wire
from HD they are not susceptical to water damage so even if the conduit gets
moisture in it it still should be ok..Mine have been in the ground for
nearly 10 years with out any problems .
I installed a 100 watt panel in the shop and did most of the electrcs which
were approved by the local qualified electrician.. Just remember you will
need some dedicated circuits. Mine were the DC system and the AC units
.these systems might well be operational when other machines are working .
If you leave you compressor on all the time then this unit might also need
to be on a dedicated circuit as it can kick in at any time .
most other machines will be operated alone even if you are using two
machines in conjunction with each other as an individual operator one will
always be unloaded. being a bad individual I have included a list of
machines I use with their power reqirements and circuit breaker selections
.you will notice there are also breakers for wall outlets [every 4 feet] and
overhead 220 and 110 volt out lets which are never used .......mjh.
List shown on alt binaries pictures woodworking
I built a new shop out back last summer and ran the electrical
I used "0" size direct burial copper cable. That size is good for
over 100 amps. I put a 100 amp breaker in the house panel. I put a
breaker panel in the shop that had space for 10 or 12 breakers (from
HD). I did not use conduit. Code here required 24" deep in the
ground for direct burial. I rented a ditcher from the local rental
place, worked great. I put each wall on a different circuit with a 20
amp gfci and added two 220 circuits for table saw and dust collector.
Lights were on a seperate circuit also. So far everyting is working
well. The "0" size cable cost almost $400.
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