Just spoke with the county and they will approve up to 115amps on 2/3 with
ground. With the rotary phase converter requiring a 70-80amp breaker, and
since I already have a 100amp breaker, that is what I plan to go with. The
extra cost in wire is offset by it being able to handle the smaller loads
better and I won't have to upgrade in the future.
Thanks to all that responded.
I will have to get the information on the brand (I think S&S) for you as it
is stored currently while I am doing the buildout. The unit has a 7.5hp
Baldor motor that I purchased based on an original thought that I would
purchase older 3-phase equipment and restore it for use in my workshop since
I am unable to get 3-phase service. Primary reason for this one was
capacity and price. I bought it used in ebay for a good price IMO.
I am rethinking the need for the rotary phase converter at my current
location. Having a somewhat longer term goal to move where I should be able
to get the 3 phase power brought in directly into a dedicated workshop
building, I will hold off on purchasing anymore 3 phase equipment. For the
3 phase lathe I have, I am strongly considering moving to a variable
frequency drive that will convert the single to 3 phase, thus obviating my
current need for the phase converter at all. The rotary phase converter I
have not is way over spec for the lathe alone, but wouldn't be for a 7.5hp
DeWalt RAS or other larger machinery that I want to delve into at some
OK, thanks...it's been a low-level "onna-these-here-days" for some time
now. I <eventually> want the shop in the barn loft and would like a
couple larger pieces such as a 4-side moulder and thickness sander that
could be in the present shop area where the low ceilings aren't such an
issue...haven't found that bargain as yet (but haven't really searched
seriously yet, either)...
If one should wander off to SW KS sometime and were in need of a home,
I'm sure something could be arranged... :)
I installed a dedicated subpanel for my shop when I built it a couple
of years ago. I did a fair amount of research in preparation for the
shop wiring and ended up using a 10/20 125amp Siemens panelboard with a
copper bus. I had only a 10 foot run from the main service panel to the
subpanel. The electrical supply store I went to had 25' of already cut
2/3 w/ground copper that someone never picked up, so he gave it to me
for 40 cents/foot and he threw in a 90 amp DP breaker, so that's what I
used (even though the ampacity of the cable conductors is much
greater). I installed ten branch circuits using 12/2 w/ ground NM cable
with 220V and 110V Twist-Loc receptacles (Hubbell - ridiculously cheap
@ $2.50/each by the box on eBay at the time) generously spaced around
the shop for flexibility in tool placement. Next to each Twist-Loc, I
also installed conventional 110V receptacles (industrial grade
Hubbell's, once again dirt cheap on eBay). I installed industrial
fluorescent T8 electronic ballast fixtures as well, divided into two
zones, controlled by 3-way switches at each of two doors. There are
both 4' and 8' dual bulb fixtures with a total of 22 4' bulbs. I made
certain to wire the lighting into the main panel on its own 20A circuit
instead of into the subpanel, so the lights wouldn't go out if the
subpanel breaker tripped (e.g., while I was ripping a narrow piece of
maple). All in all, I used about 600-700' of 12/2 NM for all of the
wiring, but it came out beautiful and works like a charm.
To minimize accidental use of any tools by unauthorized people (i.e.,
kids), I habitually flip off the subpanel breaker in the main service
panel when I'm finished in the shop.
I did make sure that I pulled appropriate permits and had everything
inspected, not because I wasn't confident in my wiring skills, but for
insurance reasons, in the event of an unexpected catastrophe. The
electical inspector turned out to be a woodworker, so for the rough
inspection, he spent more time talking to me about woodworking than
actually inspecting. He said he normally scruntinizes homeowner's
wiring, but said the wiring job was better than most professional jobs
he inspects. We both agreed that this likely relates to the attention
to detail inherent to woodworkers.
both home depot and lowes have mobile home feed cable. rated at 150
amps, i believe, capable of being buried without a conduit. sizes i
forget. it is actually 3 wires (2 aluminum and 1 copper, i believe)
twisted together. locally it runs $1.28 to $1.50 per foot. of course
installation above ground should have appropriate sized conduit where
contact could be made
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.