I have my portable 5000 watt generator ready to go for winter if I need it.
Instead of running a cord from the generator around the outside of the house
and under the garage door to the appliances that I want to run in side the
house in case of an electrical failure, can I put a female outlet on the
outside of the wall connected to a female outlet inside the wall, then plug
in a 12/2 with a ground coax from the generator to the female outlet outside
on the wall and run my inside cord from there? I would have a male plug in
on each end of the coax. Any suggestions on this?
So when the utility lineman goes to restore your power
lines, your generator creates the 4,000 or 13,000 volts that
kills him? Good reason why we don't do what you are proposing
and why emergency generators connect to household power using
specific switchover hardware. It should have been intuitively
obvious why we don't do what you have proposed.
The switchover hardware includes basic redundancy that all
such systems must contain. Too many foolishly think that
tripping the mains circuit breaker is sufficient. Again,
obviously not. Consult an electrician or review such
equipment solutions in Lowes and Home Depot for further
| How do you get 4,000 volts out of a portable generator? I'd
like to buy that
| brand of generator next time.
Everyone seems to have misunderstood the OP's question, but in
answer to this one:
Easy: When used without a transfer switch, the generator power
in the house also goes out thru the fusebox to the transformer on
the pole, and on the other side of the transofrmer, where the
linemen work most, it becomes the x,000 Volts or xx,000 Volts,
that is so dangerous. The normal step-down action of the xfmr
becomes step-up when you put voltage on the house-side of it.
And, should the power come back on, the generator WILL become
toast, even if its voltage settings are higher than the utility
voltage. Being ac, it will not be in phase with the utility and
something's going to have to give - most always the generator
unless it's a huge one, in which case the pole xfmr will explode
or at least smoke with vigor. Circuit breakers might help limit
the damage some, but most likely the generator is still going to
be toasted. If they protect anything, it will be the pole xfmr.
By backfeeding a transformer.
If the utility company's transformer steps 4KV *down* to 240 for your service
drop, and you backfeed 240 into the load side, it's stepping that 240 back
*up* to 4KV on the line side.
You should get the LDS and Mormon refs out of your signature.
First off, the Mormons I know wouldn't use a computer, and you
obviously are a phoney. Go call your utility; tell them how you
hook up a generator and see what they say. Be prepared to have a
checkbook for the deposit you'll have to put down.
| >How do you get 4,000 volts out of a portable generator? I'd
like to buy
| >brand of generator next time.
| By backfeeding a transformer.
| If the utility company's transformer steps 4KV *down* to 240
| drop, and you backfeed 240 into the load side, it's stepping
that 240 back
| *up* to 4KV on the line side.
On Sun, 14 Nov 2004 12:07:53 -0500 "w_tom"
used 24 lines of text to write in newsgroup: alt.home.repair
I think maybe everyone mis-read his post. I don't think he was
planning on hooking the generator to the rest of the house wiring. I
think he wanted to simply have a way to get the power from the
generator inside the house, then plug in appliances to the isolated
outlet, eliminating a long extension cord run to his garage.
We are discussing human life. That means everything needs,
at minimum, double redundancy. Where are the layers of
protection? Again, this is obvious and a basic fact of life.
Flip one circuit breaker and numerous failures could occur
from damage to the generator, house fire, and even
electrocuting a lineman with 4000 or 13000 volts.
If that need for redundancy is not extremely obvious, well,
I sure hope you don't do any designing. I sure hope that is
not you sitting at a stop sign just waiting to floor it. This
too are why we require redundancy. Again obvious. Why a
driver always looks twice - if not more - before pulling out.
Robert Barr wrote:
The original poster was not connecting ANYTHING to the grid, or to his
houses wiring. He wanted, simply, to have a connector on the outside
of his house that joined a connector inside the house so he wouldn't
have to pass a cable through an open door or window.
That will work, except:
1) 12/2 will only carry 20a. (or, 16a at 80%) Your genny puts out 42a.
If you generator has two 20a outlets on breakers, you could run two of your
2) The double male cord is called a suicide cord, for obvious reasons.
Plenty of people use than and I have not heard of a problem, but the
potential is there. To do this properly you should have a recessed male
outlet and a regular extension cord.
Get a transfer panel. A Generac 6 circuit with 2 watt meters , wire,
exterior box and plugs 200$ at Lowes, separatly apx 350-400. Install
apx 3-5 hrs. The panel is pre wired and labeled. It is the safest way,
plus your gen puts out power on 2 legs , a panel lets you balance the
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