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Wiring up 6.5NH (Backfeed Discussion)


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  #11  
Old 03-20-2017, 09:02:39 PM
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Jim McIntyre Jim McIntyre is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Quote:
Originally Posted by AppleTech View Post
...

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....
"4-wire 120v"? What's that?

IF you mean 3-wire 120/240 (Two hot lines plus one neutral) then OK.

Keep in mind the neutral does not connect to the chassis of the genset at the genset. The neutral wire from your genset connects only to your neutral bus bar in the main box. The chassis of the genset gets 'grounded' to the main panel through the bare (or green) #8 ground wire.
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Old 03-20-2017, 09:08:02 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

The reason I say to kill all power. It's not easy to go into a power panel. Where someone has lost an arm and your job is to clean out the mess.
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Old 03-20-2017, 10:38:43 PM
AppleTech AppleTech is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Quote:
Originally Posted by Jim McIntyre View Post
"4-wire 120v"? What's that?

IF you mean 3-wire 120/240 (Two hot lines plus one neutral) then OK.
Yes sorry I meant 4 wire including the ground but you're right 3 wire is what I meant!
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Old 03-21-2017, 12:02:40 AM
Vanman Vanman is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

120 volts won't make a mess or make you lose any limbs. It'll just stop your heart.

So be careful not to touch anything that's energized.

Last edited by Vanman; 03-21-2017 at 01:31:28 AM.
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Old 03-21-2017, 07:41:59 AM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

The Generlink is a neat device. They won't allow them here so I called the utility and asked why. They don't want the extra length hanging on the meter socket which could cause damage if you push down on it. ..Lame...
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Old 03-21-2017, 02:10:47 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

OK I called my local Building/Codes folks. They said the only thing I will need a permit for is generator connection if I don't bury any lines - If I run them along the exterior of the house to the generator I won't need permits/inspection for that portion.

I spoke with the state inspector and he was intrigued by the generator interlock device and said it sounded like it met the requirements of preventing backfeed and thought it sounded like a really neat solution.
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Old 03-22-2017, 03:44:45 AM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

Keep in mind -

The GenerLink site says -

Quote - GenerLink™ is installed by your local electric utility in less than 30 minutes. Unquote

Quote:
Originally Posted by I like oldstuff View Post
The Generlink is a neat device. They won't allow them here so I called the utility and asked why. They don't want the extra length hanging on the meter socket which could cause damage if you push down on it. ..Lame...
Considering the average consumer, it makes perfect sense to me.
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Old 03-22-2017, 10:03:57 AM
grif grif is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

And it's only good for 30 amps (per their spec sheet).

Quote:
Originally Posted by RETCPO View Post
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 04-14-2017, 03:15:15 PM
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

OK I'm in the process of wiring this up. I have the conduit run to my L5-14R and am pulling wire into the MAIN disconnect box. My one confusion is what to do about ground. Since this is the main disconnect, the bus bar is tied into the box ground and there is no ground bar. So what do I do with my neutrals and ground wires coming from the generator? Do they both get connected to the same ground/neutral bar? Note this is being inspected by local inspector (since I got a permit) so I need to know the proper way to do this.

Thanks!
-Phil
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Old 04-14-2017, 08:12:06 PM
Steve Dawkins Steve Dawkins is offline
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Default Re: Wiring up 6.5NH (Backfeed Discussion)

At your main service panel, the neutrals and grounds are bonded together by either a green grounding screw or a bonding jumper that attaches the neutral bar to the metal panel enclosure, per electrical code requirements. You will connect the generator neutral and ground to the panel neutral bar. (If you had run to the sub panel, the neutral and ground would have to be run to separate bars. The neutral in the sub panel would/should be floating from ground per code requirements.)

Assuming you have #8 wiring running from the panel to the generator, you should have four conductors. The connections will be as follows:

Panel
Black 120 volt hot (to 2 pole/30 amp breaker) > Generator M1 winding lead wire
Red 120 volt hot (to 2 pole/30 amp breaker) > Generator M4 winding lead wire
White neutral (to panel neutral bar) > Generator M2 & M3 winding lead wires (isolated from ground.)
Green ground (to panel neutral bar) > Ground to generator connection box.

You may need to sink a 5/8"x8' ground rod at the generator, and attach the ground rod to the generator frame with a piece of #8. Use a bronze acorn ground clamp on the rod. You can buy a galvanized ground rod or a copper-clad ground rod. Spend the few extra bucks and get the copper-clad rod. Galvanized rods will rust in the soil after a few years and be ineffective. I once read an article in a trade magazine about ground rods. It stated that galvanized rods were suitable for temporary services, Christmas tree lots, etc, and were effective for about 10 years maximum service. Copper-clad ground rods are suitable for about a 40 year service life.

Last edited by Steve Dawkins; 04-14-2017 at 08:31:09 PM.
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