Electrical Panel Grounding Diagram

In the maze of wires that inhabits your breaker box there s one more to be aware of.

Electrical panel grounding diagram.

Any electrical repair in your home involves turning off the power to the circuit you ll be working on and you do this at the main electrical service panel you may know the service panel as the breaker box while in the trade it s officially called a load center the main service panel is like the switchboard for all the electricity in the home. However if this 200 amp main breaker panel can t be immediately installed on the. Or more of metal water pipe is in contact with the earth. Grounding bonding 2 in our example the service equipment for the home is the 200 amp main breaker panel.

When grounding an electrical panel the following applies grounding a main panel. Grounding electrode system and grounding electrode conductor part iii znec 250 50 grounding electrode system 250 52 electrodes water pipe if 10 ft. Although the piping system is bonded to the ground through your main electrical service panel the panel grounding and the piping bonding are unrelated when it comes to function. Sub panels are grounded through the cable that provides the sub feed circuit power.

Second the main electrical panel must be grounded to a grounding electrode such as a ground rod or rods driven into the earth near the foundation of your house. Typically a bare copper wire it connects the neutral bus to a metal water. National electrical codes nec 250 5 grounding and bonding grounding and bonding electrodes include a metal underground water pipe in direct contact with earth for 10 feet or more a metal frame of a building or structure a concrete encased electrode or a ground ring nec 250 28 grounding and bonding grounding and bonding a main bonding jumper or the green bonding screw provided by the panel. The tripped breaker shuts off the circuit s current preventing a potentially dangerous situation.

Grounding a sub panel. By shunting excess line voltage back to the panel s neutral pole the ground current forces the circuit breaker to trip. Always reference the wiring diagrams listed here to see how the grounding connections should be made both to the outlet box and to the devices. Typical connection methods for an electrical outlet or receptacle.

Here is a typical connection wiring diagram for a light outlet box and fixture connection.