if you are supecting a current leakage which it trip the GFCi for hot tub why not get the Megger® to find out if this is the curpit.
many time with heating element it will get corroded or get a pinhole over the time that useally is the most common one the second most common is hot tub pump motor is next most common also so that one of the two most common devices it can trip but there are few other stuff in there can trip the GFCI
If you are famiumar with the Megger® set the 2X over the line voltage the Megger® will useally have 250,500 and i think 1KV as well depending on what model you have make sure you disconnect any lead when you do this testing so you dont blow any senstive electronic devices.
i am not sure excat number of ohms it should be a no go and go level
hope this will help ya with this
Merci , Marc
