using conduit for GC

[Riograndeelectric]

I am working on old house built in the 1950s . it was wired with a EMT 4S boxes and crimp type emt fittings. the original recps were 2 wire but some one has replaced the 2 wire devices with 3 wire devices.

are the emt crimp fittings listed for use with emt as a grounding means. would I be able to attach a ground wire to the 4s box and still be able to have an effective grounding path thru the emtback to the panel.

 

[480sparky]

Using EMT as a ground is an NEC-approved method. No mention is made of what type of fittings are or aren't allowed.

 

[Riograndeelectric]

I know that using conduit as a EGC is leagl but not sure about the intent of these crimp type of emt fittings. I would have thought that the fitting would have to be listed for use as grounding.
since this house was originally wired as a 2 wire system there might be some issues with the crimp emt fittings.

the same way that the old black GRC and black metal boxes were not listed to be used for EGC

on another note the panel in this house is an old bulldog pushmatic MLO panel. the panle was relocated about 10 foot from the orginal location, the feeders spliced in the attic and new circuits extend form the new panel location back to were they home ran.

would this panel need not be brought up to the current codes and have a main breaker installed. there currentlly is no main breaker as the feeders come right off the meter and run aprox 60 -70 feet to the panel just as when it was installed in 1950. I inherited this job from the new property management company who took the property over.

 

[480sparky]

I don't recall the NEC ever making mention of any type of EMT fitting that is or isn't excluded for using the raceway as a ground.

There's no rule that states you must update the service. The current owners, insurance company, financial institution or someone else may request or require the change, but unless there's a local code amendment otherwise, there's no NEC rule that requires the change.