Tom,
Thanks for including those guys! I forgot to mention those.
Have heard about the heat strip GFPE devices [trip setting of 30 ma max.], but not ever worked with or seen any yet.
Have seen and worked on a pump controller for a parking lot's sump pump, which used an intregal GFPE and GFCI system.
The GFCI part was a simple device with a trip setting of 3 ma. It was used with the Indicator lights on the control system's panel.
The GFPE system was adjustable trip [10 ma to 1000 ma], using Proxy switch controllers - 1 for the float circuit, 1 for the pump motor.
Had to service this controller, due to Vandalism. Also had to walk through a 3 foot deep parking lot lake before getting to the controller. Fishing "Hipwaders" come in very handy on these lakes!
Got the motor to run manually so the lake could be drained. After said lake was gone, repairs commenced.
Very interresting equipment!
Scott SET