I'm pretty sure the pigtail has to land on the neutral bus (actually 100% sure). I think any imbalance or leak will go through the neutral and the GFCI will since an imbalance and trip. I'm fairly certain if you don't connect the pigtail to the neutral bus the GFCI will never close. Kind of like when you have the line/load reversed on a GFCI receptacle.
Originally Posted by kwired
from a spa spec sheet
Providing Therapy for Life
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From Main Power Supply to GFCI
From GFCI to Spa Controls
The white neutral wire from the back
of the GFCI
be connected to
an incoming service neutral. The
GFCI will not work without it. If the
incoming white neutral wire is not
properly connected, the GFCI will
automatically trip. If the GFCI trips
when you power on the spa, you
should make sure the neutral wire is
Last edited by Little Bill; 07-08-13 at 12:06 AM.
If you aim at nothing, you will hit it every time!