Wiring Replacement Dishwasher

[solson]

Hello, I am replacing our dishwasher in our 1950's home and discovered (as I have many times before in this house), an interesting wiring situation. When I removed the old dishwasher, I found a metal junction/outlet box with a 3' flex (metal) casing attached containing 2 wires (Neutral (white) & Hot (black)). Attached to the outside of the box is a wire used for the ground. Connected to the bottom of the box is metal tubing that carries the wiring to a metal junction box located about four feet from the breaker box. From this box the wiring is continued to the breaker box along with a bare copper grounding wire which is connected to the gronding bar in the breaker box.

So, as near as I can tell, the metal tubing is being used as the ground for this applicance - is this ok??

[Wgoodrich]

When you speak of metal tubing I am taking it to be EMT. If that is correct then yes electrical metallic tubing {aka EMT} is allowed to be used as an equipment grounidng conductor.

The flexible metallic tubing or conduit you discribed is allowed to act as an equipment grounidng conductor if not over 20 amp rated branch circuit and not over 6 feet long.

Good Luck

Wg