[RE-wrenches] shared neutral critical load panel

[Mac Lewis]

Hi William,

These are 120/240 systems.  These are multi-wire branch circuits, but the
load pairings are uncommon.  For example, on the last hybrid we did, we
found that a heat tape circuit and garage lights shared a neutral.  The
garage lights were on the opposite side of the home as the heat tape
circuit.  They must have saved 30' of #10 wire by sharing this neutral.  We
wanted the garage lights on the critical load panel but not the heat tape
circuit.  We ended up keeping the garage lights out of the critical load
panel.  I think that there is no code-compliant way to do this (besides
rewiring) because of the shared raceway requirement.

Thanks


On Tue, Apr 8, 2014 at 11:31 PM, <william at millersolar.com> wrote:

> Mac:
>
>
>
> Is your system 120 or 120/240?  If it is 120 only and if your shared
> neutrals are part of a multi-wire branch circuit, you have problems.  The
> only solution I know of is to combine the circuits so they are on the same
> phase and share the same OCPD.  Otherwise it's time to rewire.
>
>
>
> If these are not multi-wire branch circuits, I am not sure why they are
> sharing a neutral.  In any case, the circuits should be combined or rewired.
>
>
>
> William Miller
>
>
>
>
>
> *From:* re-wrenches-bounces at lists.re-wrenches.org [mailto:
> re-wrenches-bounces at lists.re-wrenches.org] *On Behalf Of *Mac Lewis
> *Sent:* Tuesday, April 08, 2014 9:22 PM
> *To:* RE-wrenches
> *Subject:* [RE-wrenches] shared neutral critical load panel
>
>
>
> Hello wrenches,
>
>
>
> When installing hybrid systems and consolidating critical load panel
> circuits, how do you deal with shared neutrals?  We have moved both of
> these loads into the critical load panel or negotiated both loads being
> left out of the critical load panel because of this shared neutral issue.
>  Is there any code-compliant way of splitting these up?
>
>
>
> We have ran into some unfortunate neutral sharing load pairings lately
> that have been a headache and should never have shared a neutral.
>
>
>
> Thanks in advance
> --
>
>
>
>
>
>
>
> Mac Lewis
>
> "Yo solo sé que no sé nada." *-Sócrates*
>
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-- 



Mac Lewis

*"Yo solo sé que no sé nada." -Sócrates*
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