The role of the zero line row and grounding row in the junction box

Zero row role is: to some electrical appliances or equipment need zero line or protection zero when used.

The role of the ground row is: generally directly connected to the equipment shell as the equipment shell grounding protection.

Earth line row, also known as grounding row, is a ground wire and more than one need to be grounded equipment wiring connection and fixed a connection device. It will be fixed in a piece of copper or iron with a screw port, other grounding wire through the fixed screw connection and fixed in this piece of iron or copper can be.