How To Wire A Ct Cabinet

Your average meter socket has the neutral permanently bonded to the case where most ct cabinets require a bonding wire to be run from the grounded conductor to the grounding terminal.

How to wire a ct cabinet. Because the rope is so thin it gives you a much larger window to fit wires through plus it s extremely flexible. The colour coding looks to be all over the place. For a separate stand alone ct metering cabinet that is remote from the main service disconnecting means is there a requirement to run an equipment grounding conductor to the ct cabinet in addition to the neutral ground wire coming in from the utility service transformer. In the above diagram i shown three ammeters current transformers in the above ct wiring diagram i common a wire of all ct s my means that i connect ct one connection with one another.

5 3 4 padmount ct cabinets. 11 02 2012 08 18 am 3. Some people refer to the meters that use a ct pt combination or just ct s as a current transformer meter. My background with wiring up ct s is actually for the power company so that might colour my opinion however.

When ct s and pt s are used in a metering installation the installation is known as being transformer rated. In four wire 120 240 three phase installations the wild leg shall be identified with orange tape or other acceptable means. Transformer rated services run in parallel with the service. This is called you supply side system bonding jumper.

I can also do it without connection with one anther but the main reason behind this is that in real life we do our wiring like above diagram in our main power panel boards. Just like a split core ct the rope ct detaches in half for easy retrofit installation. When working in tight spaces it s a lot easier to work with than a rigid split core ct. 3 3 400 amp 1 or 3 phase ct cabinets.

If you re doing a lot of them what s really nice to use is solid and striped wire to help maintain phasing. The reason i m asking is i looked at a 600a ct cabinet and the main bonding jumper kit was optional.