JasonCo
Senior Member
- Location
- Houston, Texas
Hey, I'm recently turned out and just trying to learn a thing or two in my spare time. My goal for this weekend is to learn a lot about grounding and bonding and draw out my diagrams of different scenarios so I can have them in my service van whenever I need to pull them out and refresh myself before a job. I wanted to see if I'm correct with my thinking on how to ground and bond.
Equipment used:
1. Meter
2. Fusible Disconnect
3. None fusible disconnect
4. Main panel
5. Sub panel
So let's say I have a 3-phase 120/240 Delta high leg service. Let's just say the raceways are none conductive (PVC). I would make sure there is a grounding electrode conductor bonded to the neutral at the load side of the service drop. The 4 wires come down from the weather head and into the meter can. Unsure if I need a grounding electrode to earth bonded to the neutral inside the meter can? From there I pull 4 wires from the meter and into fusible disconnect. Fusible disconnect 1 has to have the ground and neutral bonded together, and a grounding electrode must go to earth. Now I pull 5 wires (adding a EGC) to a none-fusible disconnect. At the none-fusible disconnect, I bond the EGC to the ground bar and the neutral is isolated and not bonded to the metal or anything. From here I pull 5 wires to the main panel inside/outside the building. Here I bond the neutral and ground together, and also (for example) drive a ground rod and bond both to a grounding electrode. Then from main panel to sub panel, I pull my 5 wires and in this sub panel, the neutral and ground bars are NOT bonded together, and the ground bar is bonded to the frame of the panel. No Grounding electrode to earth is required here.
Just wondering if I'm right or wrong with all this? Thanks a ton for any help or corrections you might have!
Equipment used:
1. Meter
2. Fusible Disconnect
3. None fusible disconnect
4. Main panel
5. Sub panel
So let's say I have a 3-phase 120/240 Delta high leg service. Let's just say the raceways are none conductive (PVC). I would make sure there is a grounding electrode conductor bonded to the neutral at the load side of the service drop. The 4 wires come down from the weather head and into the meter can. Unsure if I need a grounding electrode to earth bonded to the neutral inside the meter can? From there I pull 4 wires from the meter and into fusible disconnect. Fusible disconnect 1 has to have the ground and neutral bonded together, and a grounding electrode must go to earth. Now I pull 5 wires (adding a EGC) to a none-fusible disconnect. At the none-fusible disconnect, I bond the EGC to the ground bar and the neutral is isolated and not bonded to the metal or anything. From here I pull 5 wires to the main panel inside/outside the building. Here I bond the neutral and ground together, and also (for example) drive a ground rod and bond both to a grounding electrode. Then from main panel to sub panel, I pull my 5 wires and in this sub panel, the neutral and ground bars are NOT bonded together, and the ground bar is bonded to the frame of the panel. No Grounding electrode to earth is required here.
Just wondering if I'm right or wrong with all this? Thanks a ton for any help or corrections you might have!