I'm running a 4/0 ground to building steel in a 1 1/4 EMT conduit. There is an expansion joint where I will transition to steel flex then back to EMT. The details show a bonding jumper across the expansion joint and the flex. Is that bonding jumper across the expansion joint required to be a 4/0? or can I use a #6.
What about communication conduit? What size bonding jumper would I be required to use?
What about communication conduit? What size bonding jumper would I be required to use?