bphgravity
Senior Member
- Location
- Florida
250.102(D) states that the equipment bonding jumper shall be sized per table 250.122. Table 250.122 is sized per the OCD ahead of the equipment,ect. However, isn't the idea of bonding jumpers to ensure effective FAULT current path. The OCD rating in 250.122 is for normal operational current. 250.4(5) states that the fault path must be capable of carrying the maximum fault current likely to be imposed on it. I know that fault current can be several thousand amps and Table 250.122 size requirements may not be enough to cover this, however, there is no calculation or table that shows what fault current could be imposed, and I never see this being enforced. Any thoughts?