Hadn't thought of disconnects at the transformer. My two panels both have no 6 copper ground wires going to brass clamps on the foundation earth about 4 or 5 ft away.
the 240 neutral in the transformer box is bare and tied to the box with a large copper strap. Can't see it while transformer is live but I recall a ground rod at the transformer. There is not now a ground wire from the transformer to the house ground system.
I have grid power backed by an unbonded gas generator through a 4 wire cord and plug to the main panel using a manual generator interlock kit. I want to replace it with a portable inverter. I bought a TP6048 that bonds the output when input ac is off. I think my choices are: 1. go inside the...
As shipped and unpowered, my TP6048 has its ac output N-G bonded. SGP help says there is a relay that unbonds when ac input is energized. So apparently this is a normally closed switch that will opens when the grid goes down and there is no other ac input. I have not been able to learn if there...
I found some nec course materials with diagrams showing bonding adjacent (three foot) main panels as "standard." These also mentioned that a transformer N-G bond is not counted as long as the ground path to the main panel is through the (high resistance) ground. If tied to the house egc by a...
I am trying to understand my house wiring to know how, where, what kind of inverter to use, and for example the bonding setting on EG4 6000xp.
I have two 200 amp main panels about 4 ft apart. Each is connected L1 L2 N directly to my customer-owned step-down transformer about 100 ft from my...