GFCIs and Treadmills

[thm_w]

Didn't realize GFCI was required in the garage already, "GFCI receptacles are required in bathrooms, garages, crawl spaces, basements, laundry rooms and areas where a water source is present." Definitely only on newer builds?

I thought that UL and IEC standards specify a maximum of 0.5 mA of earth leakage current for corded appliances (except heating/cooking appliances which are allowed a bit more).

If such a device had leakage high enough to trip a GFCI, surely it would be non-compliant with the relevant standards?

I would assume this treadmill is allowed 3.5mA, as its a grounded appliance.

https://slpower.com/App-slpower/images/whitepapers/An113%20Leakage%20Current.pdf
https://electrical.theiet.org/wiring-matters/years/2021/85-may-2021/back-to-the-forum-earth-leakage/

[m k]

When she runs an extension cord into the house and plugs it into a non-GCFI circuit, the treadmill works fine.

Extension cord from one area to the other is a no-no.

There is a safety barrier between areas.
Don't break it.

Hey, what can I say? She's a software engineer. 

If PE is connected through and through the hole in a barrier is much smaller.