Heat trace

[hhsting]

I understand heat trace circuit require require GFPE however does the following require GFPE?:

1. Temperature Probe
2. Under floor heat control panel

 

[Dennis Alwon]

I believe the Tstat for floor heat has gfci for people (4-6 ma) not gfpe

 

[hhsting]

I believe the Tstat for floor heat has gfci for people (4-6 ma) not gfpe

Do you know what code section would that be?

 

[Dennis Alwon]

I am not sure how you would install gfpe or gfci on a probe

 

[Dennis Alwon]

Do you know what code section would that be?

Nope but here-- it's built in

FGS 120/240VAC Programmable Thermostat

FGS 120/240VAC Programmable Thermostat

morelectricheating.com

 

[Dennis Alwon]

If it is in the NEC it would be in 424 I think

 

[hhsting]

Ok what about for door heat and Bi-part door heat?

 

[hhsting]

I am not sure how you would install gfpe or gfci on a probe

I have 120V single phase 20 breaker that feed temperature probe for commercial freezer used for food warehouse. I would say thru gfi breaker.

Do you know what section would cover temperature prove gfi for commercial freezer?

 

[hbiss]

Isn't this the same questions you asked here:

Commercial freezer

I have commercial freezer big in warehouse for food. The freezer has the following circuits fed from breaker: 1. Door heat single pole 20A breaker. There are cables on freezer door for heat to prevent ice formation on door 2. Bi part door heat single pole 20A breaker. There are cables on bi...

xenforo.mikeholt.com

-Hal

 

[hhsting]

Isn't this the same questions you asked here:

Commercial freezer

I have commercial freezer big in warehouse for food. The freezer has the following circuits fed from breaker: 1. Door heat single pole 20A breaker. There are cables on freezer door for heat to prevent ice formation on door 2. Bi part door heat single pole 20A breaker. There are cables on bi...

xenforo.mikeholt.com

-Hal

this is about commercial freezer temperature probe post#1 needing GFCI or gfpe

 

[tom baker]

What do the instructions say or have you contracted mfg?

 

[hhsting]

What do the instructions say or have you contracted mfg?

I have no contracted mfg permit has not been approved. What does one do in that case?

 

[don_resqcapt19]

The rules in 427.22 only require GFP protection for the heating elements. It does not require any protection for a temperature probe or control panel. However the probe and control panel are often supplied by the same circuit that supplies the heating elements, so they end up with GFP protection, even though the code does not require such protection.

 

[kwired]

The actual "probe" is likely a thermistor, RTD, or thermocouple that operates at low volts low current. The device that processes this signal may be supplied by line volts as well as directly controlling line volts.

Some clarity of the actual question is needed.

Most in floor heating controllers are supplied with line voltage, have said low volt signal circuit to the sensing probe(s) and have GFCI protection incorporated in the controller that protects the output circuit.