Zip tie cable to unit heater

[tonype]

Zip tie and non-metallic sheathed cable to this unit - is this OK?

 

[tom baker]

Maybe. See 334.15 B protection from physical damage
Would of been easy to sleeve in flex
Support is 334.30 and that allows cable ties listed and identified for securement and support
And where is the local disconnect switch? Could of installed a 4S box and switch, wait they forgot the switch.

 

[retirede]

When that unit was new it likely had metal flex from the limit switch to the motor with the intent for the supply to feed the switch. It looks like the 4 square and NM to the motor is a field mod?

 

[tom baker]

Thats an old heater, you can tell by the fan guard. Not finger safe

 

[ActionDave]

.... It looks like the 4 square and NM to the motor is a field mod?

And not an easy one to pull off given the size if the motor. Uggg.

 

[LarryFine]

Thats an old heater, you can tell by the fan guard. Not finger safe

Thanks, Lefty.

 

[JGinIndy]

As far as protection from physical damage looks like a ceiling hung unit and granted looks like crap but unlikely to get damaged. Also, the motor HP? From here appears to be an 1/8th does it really need a switch?
I could be wrong, have been before

 

[Fred B]

Those old modine heaters last a long time compared to the thermal switch. Likely the alterations were to replace a defective switch. Personally would have used MC. Based on the cable it has likely been there since early 70's, zip likely added when making repair. Looking at the NM clamp it is likely the NM is original to the motor or close to it.
Just a theory. Does OP have providence on this heater?

 

[tonype]

Home was built in 1976 - original heater

 

[retirede]

Home was built in 1976 - original heater

I still contend that the 4 square and NM to the motor are not original heater construction.

 

[Fred B]

I still contend that the 4 square and NM to the motor are not original heater construction.

4 square not likely original, NM based on age of wire, is a chance of being close to original. The NM looks like one that had last been mfg in early 70's.

 

[retirede]

4 square not likely original, NM based on age of wire, is a chance of being close to original. The NM looks like one that had last been mfg in early 70's.

I’m not doubting the age of the NM, but I am doubting that it was the original wiring method from the switch to the motor as originally manufactured.

 

[LarryFine]

I’m not doubting the age of the NM, but I am doubting that it was the original wiring method from the switch to the motor as originally manufactured.

I agree. They probably used rubber cord, and a handy-box.

 

[augie47]

"What heater ?"
(common practice here when we wish to look the other way )