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Old 03-17-2010, 08:49 AM   #31
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There was a storm related article in my local paper (The Record of NorthJersey.com) about a couple CO deaths that were attributed to the use of generators.
Apparently, these people were using them indoors; in the basement to power their sump pump or other pump where there was flooding and power outage.

There are big, bold warnings on these machines that state clearly not to operate indoors or in any case where the exhaust is blocked.
These same people wouldn't think of operating their lawnmowers indoors, would they? But then, I guess if they had grass indoors, they would!

FW
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Old 03-17-2010, 09:04 AM   #32
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Up here in Albany a couple years ago, a couple had their generator on a patio outside (may have been a covered patio) and they both died of CO poisoning.

Generators should not only be outside, but away from any doors or windows.
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Old 03-17-2010, 09:46 AM   #33
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DH eyes generators now and then - but the cost benefit analysis for us leads to no generator - our longest blackout in three years was 3 hours when a transformer blew in our neighborhood.

It's nice living less than a mile from our well run publicly owned utility!
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Old 03-17-2010, 05:54 PM   #34
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Quote:
Originally Posted by HooKooDooKu View Post
Section 702.5(1) seems to apply to this type of situation:

"Where manual transfer equipment is used, an optional standby system shall have adequate capacity and rating for the supply of all equipment intended to be operated at on time. The user of the optional standby system shall be permitted to select the load connected to the system."
A generator system that would not pass code would be one serving an apartment building where there was no control over what electrical equipment the tenants switched on and the generator could not handle the expected load.
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Old 03-17-2010, 06:49 PM   #35
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Originally Posted by Stubbie View Post
$250 if you have them custom make one that is not from their inventory. Their product is very well made and after having had a machine shop make some for me out of aluminum stock because interlock.com didn't have what I needed .... I'm here to tell you there is more to it than meets the eye. So the price is not out of line. Factory interlocks are a better way to go but for panels that don't have factory interlocks I wouldn't be afraid of interlock.com. just stay away from having them take your measurements and custom building one. If you talk to Justin at interlock.com you will find out why.

Interlocks are not my first choice nor are portable generators but they get the job done and done safely along with economically. All power companies I've worked with will accept interlocks. You have to get approval or phone them for the list of approved devices in many jurisdictions. There was a slight problem with having them made by my machine shop so I no longer custom make interlocks for a panel that doesn't have a factory interlock or listed interlock available. I would put mine against any out there however but it's all about liabilty ... so I advise against it.
I guess an interlock is cheaper then a Genpac where you can only control 6 circuits
I do not consider the price really out of line in the grand scheme of things
My Genpac came with the gen - a friend upgraded to a bigger automated gas model & gave me a great deal on the Generator, genpac & small bin to house the generator
Much less then I could have bought it all for...maybe 1/2 price if that



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Old 04-03-2010, 12:17 PM   #36
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I just shut off the main on the outside of the house, then lock the cover with a padlock. Back feed into the dryer outlet and select panel circuit breakers you need. Does that sound OK?
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Old 04-03-2010, 12:59 PM   #37
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Every generator that's connected to a system normally fed from a utility absolutely must have an interlock system that makes it physically impossible to backfeed the utility with the gen.

Turning off the main, and even locking it out, then backfeeding a receptacle does not qualify as physically impossible.

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Old 04-03-2010, 01:41 PM   #38
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No because the cover can be unlocked & then both can be turned on at the same time
As stated it must be physically IMPOSSIBLE for both to be turned on at the same time



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Old 04-03-2010, 02:31 PM   #39
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Quote:
Originally Posted by naehring2000 View Post
$150 for a UL Listing
Not exactly. They used Wyle Laboratories.

UL by no means has an exclusive hold on the nationally recognized testing market.
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Old 04-03-2010, 05:50 PM   #40
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I'm wondering how the interlock kit passes code. Here in Canada if you have a gen hooked up the service neutral must be disconnected as well. Siemens makes a 6 circuit 30A gen panel( which is all your genny will put out unless it's a large one with bigger than a 30A twistlock or a hardwired variety) which works very nicely and only costs about $150 canadian to buy. You would do what was originally said and move all circuits over from the main panel into the gen sub panel that you want on when power goes out and feed the gen panel with a double pole 30A from your main. Inside the gen panel is a main with three spots on each side ( for your two hots and neutral from each source) and a mechanical interlock that insures that both power sources can't be one at once but they can both be off.

You can also bet around only having 6 circuits by using slim line breakers but rarely will you need more the 6 spaces. Many people make the mistake of buying a 7kw or 8kw portable generator not realizing that there's only a couple of 120v plugs on it and a 240v/30A twistlock limiting how much of that power you can actually use.

there are other ways to do it as stated above but this method is idiot proof. You yourself may well have the knowhow to "backfeed" a panel and choose what you would like to have on at any given time but what if it's someone else attempting to start it up and your not around. I already know of one person that almost lost his son due to doing it the fast way....not the safest way.

Last edited by andrew79; 04-03-2010 at 05:54 PM.
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