Installation Guide

2015 UL 943 Update
GFCI Self Test Feature
www.usa.siemens.com/gfci
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Underwriters Lab (UL) 943 requires that a Self Test and
Lockout feature be included in all GFCI circuit breaker devices
manufactured after June 29
th
, 2015. Testing GFCIs on a monthly
basis is a good idea that is sometimes forgotten. UL suggests GFCI
devices be tested every 30 days after installation to ensure they
are properly working. Now the new Self Test and Lockout feature
enables the GFCI circuit breaker to automatically and continuously
test itself to ensure that it is working properly. If it is detected
that the device has been compromised, the device trips itself and
locks out the homeowner from resetting the device, reducing the
possibility of the homeowner incorrectly assuming that the device
was tripped to prevent a ground fault. This will help guarantee the
best protection is given to your home at all times.
Frequently Asked Questions (FAQs)
Q: Why won’t the breaker turn on when I take it out of
the box?
A: The breaker has to have power to run the self test and
turn on pigtail must be hooked up to the neutral bar and
load center energized.
Q: Will all my GFCI breakers trip if the power goes out?
A: No, if the breaker is in the on position and the power goes
out, the breaker will not trip. Once the power comes back
on, the breaker will run the self test and stay on as long as
the electronics have not been compromised.
Q: If the breaker trips due to a fault, will the homeowner
be able to turn the breaker back on?
A: Yes, the breaker function is the same as before the new
Self Test feature. If the breaker trips due to a fault, and
the homeowner turns the breaker back on, the breaker will
turn on. If the fault is no longer present, the breaker will
stay on. If the fault is still present, the breaker will trip.