Went on a service call today to install some timers in a multi gang new work box in a fairly new dwelling and the grounding conductors were made up seperatly for each set of switches according to the circuit that they were fed from.I was taught that the grounding conductors must always be all connected together at each juction box even if from different circuits.
Am I correct?
What code requires the grounds to be connected together at each juction?
250.148 Continuity and Attachment of Equipment Grounding Conductors to Boxes. Where circuit conductors are spliced within a box, or terminated on equipment within or supported by a box, any separate equipment grounding conductors associated with those circuit conductors shall be spliced or joined within the box or to the box with devices suitable for the use. Connections depending solely on solder shall not be used. Splices shall be made in accordance with 110.14(B) except that insulation shall not be required. The arrangement of grounding connections shall be such that the disconnection or the removal of a receptacle, luminaire (fixture), or other device fed from the box will not interfere with or interrupt the grounding continuity.
Exception: The equipment grounding conductor permitted in 250.146(D) shall not be required to be connected to the other equipment grounding conductors or to the box.
I see spliced or joined to the box, either way they end up eclectically connected.
I also would ask what exception would be needed for if the main part of the section did not require all grounding conductors to be joined?
That should be electrically not eclectically
[This message has been edited by iwire (edited 10-27-2004).]
Bob Badger Construction & Maintenance Electrician Massachusetts
Electrical connections must be "electrically and mechanically connected." Simple solder will qualify for the 'electrical' part, but, since solder loses its' strength when it gets hot, does not meet the 'mechanical' part. Twisting the wires does 'mechanically' connect them, and solder was thought to improve conductivity. Solder was also thought to make the connection 'permanent,' as opposed to simply twisting the wires together for a temporary connection. Keep in mind that wires were being connected for some time before wire nuts were invented.
Ryan_J and Iwire...thanx for refreshing my memory as to the code that applies to the connection of all grounding conductors at a juction point...250.148... where the circuit conductors are spliced also of coarse.