EGC pigtail in pump control box?
#1
04-24-03, 07:24 AM
EGC pigtail in pump control box?
Next in the saga of wiring a pump control box:
The metal control box chassis has TWO green screws which must be for the EGC. Question is, should I pigtail a EGC wire via a wire nut joining the line and load EGCs so there's a continuous EGC connection between line side and load side with the pigtail grounding the box via ONE of the green screws...OR...is fastening the EGC coming from the pump to one green screw, and the EGC to the pressure switch to the other green screw sufficient?
In the pressure switch, seems like it's designed to be done the second way (no pigtail), since there's very little room in the pressure switch housing for a pigtail, and TWO green screws are provided there as well.
I've only ever wired recepticles and switches with plastic boxes, where I always provide continuous EGC and also pigtail to the green screws on the outlet or switch. So the general question is, are metal boxes considered a sufficient EGC path?
The metal control box chassis has TWO green screws which must be for the EGC. Question is, should I pigtail a EGC wire via a wire nut joining the line and load EGCs so there's a continuous EGC connection between line side and load side with the pigtail grounding the box via ONE of the green screws...OR...is fastening the EGC coming from the pump to one green screw, and the EGC to the pressure switch to the other green screw sufficient?
In the pressure switch, seems like it's designed to be done the second way (no pigtail), since there's very little room in the pressure switch housing for a pigtail, and TWO green screws are provided there as well.
I've only ever wired recepticles and switches with plastic boxes, where I always provide continuous EGC and also pigtail to the green screws on the outlet or switch. So the general question is, are metal boxes considered a sufficient EGC path?
