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How to wire Arc Fault breaker

120 volt circuit breaker

Ordinary 120Volt Breaker

Ordinary non-protected breaker
120 Volt arc fault breaker

120Volt arc fault breaker

Hot and Neutral connect to arc fault breaker
White wire from breaker connects to Neutral busbar

Maximum 12 boxes per circuit breaker
Don't use two protection devices on same circuit.
When installing Arc Fault breaker (or GFCI breaker), then remove all other GFCI outlets and combo devices that are on same circuit.

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Install arc fault breaker

Install arc fault breaker

How is arc fault different from GFCI? Wiring is same for both.
Arc fault does same thing as GFCI: tripping when there is a short to ground
But arc fault also trips when there is a spark or loose wire
arc fault breaker wiring

Arc fault breaker wiring

Arc fault breaker trips when there is short to ground (same as GFCI) but it also trips when a spark is detected on the line
Spark from loose wire will trip breaker... this will signal that wire is loose under the screw plate, or there is a ground fault on the line

Only one GFCI-protection device per circuit...

so you cannot have both GFCI and Arc fault on same circuit... you cannot have 2 GFCIs on same circuit.... two devices will cause tripping

You can have ordinary circuit breaker and GFCI -or- ordinary breaker and ACI on same circuit... plus you can add surge protection to same circuit

It is OK to have more than one ordinary breaker or fuse per circuit, but only one GFCI or AFCI per circuit
For example ordinary breaker at the main panel, and ACI located at the swimming pool subpanel

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arc fault

Loose connections cause arc / or spark

Install arc fault breaker and the breaker will trip when spark or arc is detected
Stranded wire
Larger image

Do not use stranded wire under screw plates

Frequently, outdoor pool equipment and other wiring is done with stranded wire
Stranded wire will cause fire if wire comes loose under the screw plate

Do not use stranded wire under screw plate on timer, contactor, relay, outlet, switch or any electrical device
Heat from amperage can loosen wire and eventually cause arcing and fire
timer fire

Fire caused by stranded wire

Arc fault breaker would most likely prevent this from occuring

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