Neutral Wire Bus Bar
A double tapped neutral is when more than one neutral wire is fed into a single screw terminal on the neutral bus bar in the main electric panel.
Neutral wire bus bar. When there is two neutral wires in one hole on the neutral bar of an electrical panel several things may happen. And on spas if ground wire is loose or water filled equipment you can have that voltage in water. Consider the schematic for a flash light.
If that voltage is not the same it will trip gfci. They relate to safety and should be corrected. Neutral bus bar once the power leaves the electrical service panel through the hot wire s of a circuit and does its work through the electrical devices light bulbs outlets etc the electrical current returns back to the service panel through the neutral usually white circuit wire which is connected to the neutral bus bar.
However the white and bare wires both have the same ground. There is nothing neutral about a neutral wire. The original bar is mounted in a plastic housing which i assume isolates it from the box.
The bare wire is a ground to. There is also a bare ground wire from the neutral bar to the water pipes. The black hot wires are protected from overload by circuit breakers in the panel which typically sense the current in the hot wire and trip out if current is exceeded for too long.
Information about what is a neutral bar and how it useful in service panels. The white wire is neutral not ground. The problem primarily comes from the inappropriately named neutral wire.
The main feed is 3 wire with 2 hot legs to the main breaker and an aluminum wire to the neutral. Some gfci breakers have between 30 80volts on neutral. Neutral bars are widely used in residential and commercial electrical service panels to terminate all those white neutral or return wires from the many load circuits in the building.
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