chris huckins
Member
- Location
- collinsville,il
Having some disagreements concerning the ground conductor installed with the secondary conductors on a seperately derived system.
1. What is the proper term for this conductor?
2. How is this conductor sized?
One half of the argument says this conductor is called an "equipment grounding conductor" sized off of Table 250.122 for the size of the main overcurrent device the conductors are terminating on in the 120/208 panelboard.
The other half of the argument says this conductor is called a "supply side bonding jumper" sized off of 250.102(c) which refers you to table 250-66 based on the size of the largest derived phase conductor. Our installation does not have overcurrent protection at the transformer for the secondary conductors, we will be using the ten foot tap rule in accordance with 240.21(c)(2) and the conductors will be terminating on a main overcurrent device at a panelboard. I believe the correct answer is option 2, what does everyone else think?
1. What is the proper term for this conductor?
2. How is this conductor sized?
One half of the argument says this conductor is called an "equipment grounding conductor" sized off of Table 250.122 for the size of the main overcurrent device the conductors are terminating on in the 120/208 panelboard.
The other half of the argument says this conductor is called a "supply side bonding jumper" sized off of 250.102(c) which refers you to table 250-66 based on the size of the largest derived phase conductor. Our installation does not have overcurrent protection at the transformer for the secondary conductors, we will be using the ten foot tap rule in accordance with 240.21(c)(2) and the conductors will be terminating on a main overcurrent device at a panelboard. I believe the correct answer is option 2, what does everyone else think?
