flm13
I have a 14KW Generac, Model# 5871/Serial# 7013944, installed 05/2012. The unit is dealer maintained and running well (too often recently due to POCO local distribution problems). So, no problems, but I would like to add more circuits to the generator panel (current 14 circuits are full). I am not adding significant load, just more lighting-convenience circuits. The current max load on the generator is less than 4 KW and the added load is less than 1 KW. The house was wired originally with few circuits, and has been rewired, including a new service, to correct this. This has resulted in several circuits with little load on any one. I would appreciate thoughts on adding a few more circuits to the system - hopefully without the expense of a new transfer switch.

Thanks,

Frank
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Cobranut
I'd think you could add a sub-panel, fed from a 30 or 40A breaker in the transfer switch, and add the additional lighting circuits to that panel.
If you use cfl or led bulbs, lighting loads are very low these days.
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Canada_Guy
Cobranut;n58501 wrote:
I'd think you could add a sub-panel, fed from a 30 or 40A breaker in the transfer switch, and add the additional lighting circuits to that panel.
If you use cfl or led bulbs, lighting loads are very low these days.


This is exactly my set up. I run a 16-circuit sub panel off a double 40-amp breaker in the transfer panel. They are all lighting/standard outlet circuits, so the over-all load is low.

Just ensure your grounds and neutrals are separated and there is no ground to neutral bonding jumper in the sun-panel.
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78buckshot
I have seen some piggy-back breakers in a load center, just sayin'.
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flm13
Thanks for the attention and wisdom. I assume that the sub-panel is not fed through the Generac-provided whip, but using another cable (or conduit) from a knock-out on the transfer switch to the sub-panel. And I am aware of the ground-neutral separation in a sub-panel. I was an electrician in a former life a long time ago, but I know little about the particulars of current codes and generator installation. I will check into the piggy-back breakers, but I again assume that an additional conduit is required for the wiring into the transfer switch.
Thanks again to all.
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Cobranut
flm13;n58511 wrote:
Thanks for the attention and wisdom. I assume that the sub-panel is not fed through the Generac-provided whip, but using another cable (or conduit) from a knock-out on the transfer switch to the sub-panel. And I am aware of the ground-neutral separation in a sub-panel. I was an electrician in a former life a long time ago, but I know little about the particulars of current codes and generator installation. I will check into the piggy-back breakers, but I again assume that an additional conduit is required for the wiring into the transfer switch.
Thanks again to all.


I'm not really following your question.

You just need to feed the second sup-panel from one 2-pole breaker in the transfer switch panel.
Then your additional circuits would feed from breakers in the new panel.
They would be powered from either the utility, if available, or the genset during an outage.
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flm13
Thanks for replying. I will try to be more clear. All of the connections to my transfer switch (except generator input) are currently in the Generac-supplied whip to my main breaker box. Poco power to, and all power from the transfer switch goes through this whip. The main breaker box serves as a junction box for the 'hot' generator supplied circuits (the neutrals and grounds are in their original positions in the main panel). I cannot introduce more wires into this whip. Therefore, any additional circuits would have to be in a sub-panel connected by a conduit from a new knock-out or punch-out in the transfer switch. However, are only the hot (non-neutral) conductors for the additional generator-fed circuits located in this sub-panel, with the neutrals and grounds remaining in the main panel where they are now (like Generac does with their whip) or do I need to move the neutrals/grounds to the sub-panel as well? The sub-panel would be grounded in any case.

I hope this is a bit clearer now. It's clear-as-mud to me!! Thanks
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Cobranut
I understand now, but I'm not familiar at all with that type of transfer switch setup, so I feel it would be best to defer to someone else who can better guide you.
Sorry that I couldn't be more help.
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flm13
I do appreciate your input. Thank you.
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