just wondering if this is acceptable.

[69gp]

Went back to a job that we had going on for a few months and found out that another contractor had changed out a few transformers in the boiler room. The install looks good but I was just curious if the ground wires were installed properly. The reason for the change out was to install new energy efficient ones. I was brought up in the trade always being told the following. When running a ground wire in the open from an enclosure that as soon as you leave the enclosure say via a chase nipple that you always installed a ground bushing. Next I was always told that if you run a ground wire in a conduit that you always install a bonding bushing on the end to ground the conduit. I was told that if you did not do this that the conduit would act like a choke and not let the fault go to ground. is there any truth to this.

I only bring this up as I have attached a few pictures of the install showing the new transformers with the grounding.

Ground wire passing through the side of the transformer via reducing washers and a plastic connector

Ground wires exiting conduit via a plastic connector this is typical for both ends. The conduit is about 20' long and has no other ground attached to it. Is this ok?

thanks

 

[jumper]

I believe that 250.64(E) addresses this issue.

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[infinity]

I would add that the cord grip fitting is not listed for the use shown in the photo's.