Double-Tapped Breaker
A double-tapped breaker has two wires clamped under a terminal that is made for one. Most breakers are made for a single wire per terminal. A few models are rated for two wires of certain sizes, and the manufacturer marks them that way.
It usually happens when a circuit is added and the panel has no free space, so the new wire gets tucked under an existing breaker. Two wires in a one-wire clamp may not both be held tight, and a loose connection heats up. The fix depends on the panel: a new breaker in an open space, a short splice so only one wire lands on the breaker, a tandem breaker where the panel is listed for one, or a subpanel when the panel is truly full.
Neutrals are stricter. Each neutral (white) wire has to land on its own terminal on the neutral bar. Two neutrals under one screw is a fault even in a panel where two hot wires on one breaker would be allowed.
Other panel workmanship faults we look for at the same time: open breaker spaces with no cover, a missing or out-of-date circuit directory, and breakers that are not made for the panel they are in.
Also known as: Double tapTwo wires on one breakerDouble-lugged breakerDouble-tapped neutral
Why it matters in Santa Cruz County
These faults tend to build up in panels that have had circuits added over the years. On its own, a double tap is a repair, not a reason to replace the panel. It becomes part of a bigger conversation when the panel is out of space or has other problems.
Sunrise's take
We correct double taps and open spaces as part of panel repair, and every breaker we install is made for the panel it goes in.
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