G.
Use care in opening and closing doors to energized equipment. Conductors and
terminations may be exposed and within reach of openings.
H.
Carefully inspect work area and remove any tools and objects left inside equipment
before energizing. Install all devices, doors, covers, barriers, etc., before energizing
equipment.
4.3
Installing Circuit Breaker-Type AFCIs and GFCIs in a De-energized Panelboard
Follow the manufacturer’s recommendations when installing AFCI and GFCI circuit breakers.
These instructions provide general guidance for installing AFCIs and GFCIs in new construction,
before power to a panelboard has been initially energized.
A.
Remove the panel cover, if installed. Test the panelboard to ensure that it is de-
energized.
B.
Remove the existing circuit breaker, if any, and install the AFCI or GFCI circuit breaker
in the de-energized panelboard with its operating handle in the OFF position. Tighten
and torque the bus-connecting bolt of bolt-on circuit breakers in accordance with
manufacturer’s recommendations.
C.
Connect the circuit breaker neutral conductor pigtail to the neutral bus bar of the
panelboard in a dedicated terminal in the bus bar. Do not connect the circuit breaker
neutral conductor pigtail to a terminal with another conductor, equipment grounding
conductor or neutral conductor [NEC 110.14(A) and NEC 408.41].
D.
Identify the phase, neutral, and equipment grounding conductors of the circuit requiring
AFCI or GFCI protection. Connect the equipment grounding conductor of the branch
circuit to the panelboard equipment grounding bus bar. Connect the circuit neutral
conductor to the neutral connection lug of the circuit breaker. Connect the circuit phase
conductor of the branch circuit to the phase connection lug of the AFCI or GFCI circuit
breaker. Ensure that the circuit phase conductor is connected to the same circuit breaker
as the circuit neutral conductor.
E.
Tighten and torque all terminations in accordance with manufacturer’s recommendations.
F.
Install the panelboard cover, removing knockouts as necessary for any additional circuit
breakers, and energize the panelboard in accordance with NECA 409.
G.
With no load connected to the circuit, turn the circuit breaker handle to the ON position.
H.
Move the circuit breaker handle to the ON position.
