Modifying Breaker Panel Into Transfer Panel

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  #1  
Old 10-11-09, 05:59 PM
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Modifying Breaker Panel Into Transfer Panel

I have wired up a whole-house transfer panel before,
connecting a 13kW generator. The panel I used, was
very simple - two normal-looking 200A breaker pairs
and a mechanical interlock to ensure there is no
cross connect. I have since moved and don't recall
the brand name.

Looking at that setup, it seemed to me that a standard
panel could be similarly modified to get the interlock
on the input whole-panel breaker and one of the nearby
slots, to get an all-in-one. I would prefer this and prefer
to fabricate my own interlock. I would feed the generator
hots in through a free 100A breaker pair (it has 60A local
breakers on the gen head, I just want a switch that can
take the amperage and have some).

Question 1 - has anyone seen a kit or plans for this
kind of thing? The construction was really simple, just
sheet metal sliders and stops. I could experiment but
a plan would be swell.

Question 2 - anyone come across the kind of transfer
switch I am talking about, who could remind me of the
name? Then I might be able to chase down parts or
drawings.
 
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Old 10-11-09, 06:41 PM
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Welcome to the forums! Having had a friend with the local power company killed during Hurricane Ivan from an improperly interlocked generator that backfed through him, I can only advise spending less money and get a Generac transfer switch and be done with it.
 
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Old 10-11-09, 06:43 PM
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They're out there. You can buy one to modify almost any panel and they have backfeed breakers as well. All have been tested.

I hope we can post links, in case it gets deleted search on generator interlock.

Generator InterLock Kit
 
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Old 10-11-09, 06:48 PM
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Thanks - that link has exactly the thing I was thinking of.
 
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Old 10-12-09, 04:39 AM
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I was more concerned with your making your own. Glad there is something that may have the UL label that has been tested.
 
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Old 10-12-09, 06:43 PM
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I just want to give you a head up some electrical inspectors will not approve that type of interlock due someway it can defeat the safety interlock when the cover is removed so that why you have to becarefull if you go this route so check with them first before you buy it.

Here in my area in North east Wisconsin they do not approve the interlock kit at all a true transfer switch they do allow it.

Merci,Marc

{ France do not allow interlock switch as well they only allow true trasfer switch with visbile handle }
 
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Old 10-12-09, 06:57 PM
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Keep in mind that ANY type of interlock kit will have to be not only UL approved, but also approved by your local AHJ and installed by a qualified electrician in order to release you of any possible liability in the event of an equipment failure. You cannot just "fabricate" an interlock switch.
 
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Old 10-21-11, 07:40 AM
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Siemens Safety Interlock Kit

Siemens makes a whole like of safety interlock kits that will fit residential panels up to 225A main feed. I used Siemens part #ECBPK01 kit for my 100A main panel, where two 2-pole breakers sit across from each other, and includes a brace securing both breakers to the panel to prevent accidental breaker removal when the cover is removed. The kit's slide- handle goes UNDER the front panel center spar, which means that the interlock function remains even when the front panel is removed.

A UL-certified interlock kit should meet four critetia:

1) Both breakers must never be ON together;
2) Both breakers must be able to be OFF together;
3) Both breakers must be secured to the panel;
4) Safety interlock MUST function when the front cover is removed.

This kit meets all four criteria, meaning it should pass code everywhere in the 'States.

Hope this helps

-CB
 
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Old 10-21-11, 09:38 AM
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This is a two year old post. If you have more questions please start a new thread.

Thank you,
Ray
 
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