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Wiring up 6.5NH (Backfeed Discussion)


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Old 03-20-2017, 03:47:36 PM
AppleTech AppleTech is offline
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Default Wiring up 6.5NH (Backfeed Discussion)

OK - so I spoke with a local electrician and he mentioned that the most economical way for me to hook into my setup based on how my boxes are set up (primary mains box and a sub panel in the garage) would be to add a breaker to the main box and backfeed into that rather than going with an external transfer switch. Per code here it is OK as long as precautions are taken to prevent both power sources from being live at the same time. This kit seems to resolve that (http://www.geninterlock.com/product/...ansfer-switch/).

So I wanted to run my plans by everyone here based on my discussion with him as I also value everyone's input here. I have a 6.5NH that will be pushing 4-wire 120v out:

- Add a breaker to the main panel (dual 30-amp, one for each leg) for the generator to hook into
- Add the above linked generator interlock physical lock-out
- 30-40 foot run of #8 4-wire out to the generator pad (he recommended buried conduit as well as #8 in case I ever wanted to upgrade the generator to a higher-KW unit.
- In the same conduit, I would have a #14 3-wire hooked into the same panel (but obviously a different breaker) to feed a battery minder when on utility power.

And apparently reading up online I can probably do the work in the main box myself. I was a bit sheepish at first but it looks like all the connections are on the lower side (since it is an outdoor box) so I won't be getting my hands up near the mains... am I crazy?
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Old 03-20-2017, 03:59:43 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

In one word YES. You never want to work on a live system. One slip and you will find out why. I have never worked on a live system. Unless it was a system that could not be shut down. Hospital,nursing home,military base and so on. Then I had my hot gloves,rubber mats,hot blankets and a rope around me. So my helper could pull me off

You do not want to do this yourself. Because if something goes wrong and insurance company finds out you did the work. Insurance will be canceled leaving you to pay for ALL damage. Hire a qualified person,have an inspector sign off on it.
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Old 03-20-2017, 04:13:52 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

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Originally Posted by Billy J Shafer View Post
You do not want to do this yourself. Because if something goes wrong and insurance company finds out you did the work. Insurance will be canceled leaving you to pay for ALL damage. Hire a qualified person,have an inspector sign off on it.
Good enough reason. I can definitely bring them out to do the box install. Do the other portions sound reasonable?
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Old 03-20-2017, 05:12:28 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Sounds fine to me. But it will need to comply with the local codes.

I was involved in a case down here. Man backfeed through the dryer plug. Then left to go to town. Fire got started. By the time it was all over. His bill was over 1.4 million. He had to pay. He lost everything just to pay the bill.
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Old 03-20-2017, 05:27:17 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

This probably will work for you.
http://www.interlockkit.com/
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Old 03-20-2017, 05:32:28 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

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Originally Posted by I like oldstuff View Post
This probably will work for you.
http://www.interlockkit.com/
I saw that one first and that got me searching. The one I linked to is actually very similar but less expensive! Much cheaper than a transfer switch.
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Old 03-20-2017, 05:50:30 PM
LRomero LRomero is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Have you guys seen the electric meter interlock version? Don't know the pricing, just came across this last week when I was looking at ATS'.

http://www.generlink.com/about_generlink.cfm
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Old 03-20-2017, 06:15:46 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

GenerLink will only be marketed to electric utilities to resell to their residential customers.

http://www.generlink.com/about_pepcotech.cfm
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Old 03-20-2017, 08:43:47 PM
Jim Rankin Jim Rankin is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Upgrade the 14-3 to 12 gauge. Cost a few $ more but has a lot more capacity.

If you have a main breaker, I see little danger to you working in the box below it when it is shut off.
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Old 03-20-2017, 08:57:30 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

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Originally Posted by Jim Rankin View Post
Upgrade the 14-3 to 12 gauge. Cost a few $ more but has a lot more capacity.

If you have a main breaker, I see little danger to you working in the box below it when it is shut off.
Thanks for the tip. That was my thought re: the box. The only live item would be above the main breakers, and I would not be going up there. I'm pretty meticulous and don't mess around. I also plan to never run my unit when I'm not home.

I can appreciate both sides of the fence!
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