I have recently started working at a new plant and have an issue with the way transformers are being grounded/bonded, but cannot find anything in the NEC stating it is wrong.
Basically for all transformers, the grounding electrode conductor connection is made at the transformer. Therefore the system bonding jumper is also installed at the transformer and routed with the phase conductors to the first disconnecting means. However once at the first disconnecting means, the system bonding jumper is terminated to the disconnect enclosure, and the ground bus is bonded to the enclosure.
I know (I think) that the system bonding jumper should terminate to the ground bus, but cannot find where this is stated in the NEC. Am I right, or is it OK to bond the system through the enclosure.
Basically for all transformers, the grounding electrode conductor connection is made at the transformer. Therefore the system bonding jumper is also installed at the transformer and routed with the phase conductors to the first disconnecting means. However once at the first disconnecting means, the system bonding jumper is terminated to the disconnect enclosure, and the ground bus is bonded to the enclosure.
I know (I think) that the system bonding jumper should terminate to the ground bus, but cannot find where this is stated in the NEC. Am I right, or is it OK to bond the system through the enclosure.