Mike Dolt Enterprises Logo Mike Dolt Enterprises

Topic: Heat Trace Cable above ceiling

User: rtselectric, Location: Massachusetts

Asked on: Wednesday, August 13, 2025 at 2:19 pm EDT
Answered on: Wednesday, August 13, 2025 at 2:19 pm EDT

Question: Hello all. I am working on a project that involves the use of Easy Heat In Pipe Heat Trace cable in Drain Pipes located above a finished ceiling in a residential parking garage below ground. The heat trace cable is internal to the drain line and has a factory-supplied ILSR power feed end with an integral GFCI device and molded cord cap. The intention was to install 12x12 access panels at each power connection point with a receptacle within the ceiling. Here is the issue: the electrical inspector says this is a violation of code since power cables can not be above a ceiling unless they have a rating to be used above a finished ceiling. Question #1- What rating should I be looking for, as I've never heard of this before? #2 Wouldn't this be acceptable since it's part of an assembly and not just an extension cord? I should probably know this, but unfortunately, I was asleep in class 25 years ago!Any help would be appreciated!

Okay, let's break down this situation with the Easy Heat In-Pipe Heat Trace cable and the electrical inspector's concerns.

Understanding the Issue

The electrical inspector is focusing on the use of flexible cords (like the cord cap on your heat trace cable) above a suspended ceiling. The NEC (National Electrical Code) generally restricts the use of flexible cords for permanent wiring or concealed wiring, especially in inaccessible areas like above ceilings. The concern is primarily about potential for damage to the cord, difficulty in inspection and maintenance, and increased fire risk if the cord isn't rated for such an environment.

Question #1: What Rating Should I Be Looking For?

You're likely not going to find a "rating" in the typical sense that applies to the entire cord assembly that specifically allows it above a suspended ceiling for permanent use. The inspector's concern is likely more related to code compliance regarding the type of cord being used and whether it is permitted for the application, regardless of the presence of GFCI. Here's what to consider: Cord Type (NEC Article 400)

The first place to look is the type of cord used on the Easy Heat product. Common types include:


S, SO, SJ, SJO, SE, SEO, ST, STO, etc.

These are general-purpose cords that can be suitable for some applications but are often not permitted for permanent wiring above ceilings.

Hard Usage and Extra Hard Usage Cords

These are more robust and may be more acceptable in certain situations, but generally are still restricted from being permanently installed concealed behind walls or above ceilings.


Heater Cords (HSJ, HPN, etc.)

These are designed for appliances that generate heat. The labeling of the cord will be extremely important.

UL Listing

The
entire Easy Heat assembly (cable + cord) should be UL listed (or a similar nationally recognized testing laboratory - NRTL). The UL listing will indicate the intended use of the product. Read the UL listing information carefully. It may specify restrictions on its use.

NEC Article 400.8 (Uses Not Permitted)

This is the critical section of the NEC. It lists where flexible cords and cables cannot be used. Pay close attention to the following:

(1) As a substitute for the fixed wiring of a structure

This is the core of the issue. If the inspector views the cord as a substitute for permanent wiring to supply power to the heat trace cable, it's a violation.


(2) Where run through holes in walls, structural ceilings, suspended ceilings, dropped ceilings, or floors.
Running the cord through holes to connect to the receptacle above the ceiling is likely a violation. (5) Where concealed behind building walls, structural ceilings, suspended ceilings, or floors.Question #2: Wouldn't This Be Acceptable Since It's Part of an Assembly and Not Just an Extension Cord?

This is where it gets nuanced:
The "Assembly" Argument

You're right that it's part of an assembly. The manufacturer designed the heat trace cable with the cord attached. However, that doesn't automatically exempt it from code. The NEC is concerned with how the assembly is installed. If the installation method violates the NEC's restrictions on flexible cord use, the "assembly" argument won't hold up.

Intended Use is Key

The manufacturer's instructions and the UL listing are critical. What does Easy Heat say about the installation of the cord portion of the assembly? If they explicitly allow it to be above a suspended ceiling, that strengthens your case. If they are silent or recommend direct wiring, you have a problem.

Potential Solutions and Approaches
1. Review the Easy Heat Documentation

Thoroughly read the installation instructions, the UL listing information, and any other documentation provided by Easy Heat. Look for anything that addresses the use of the cord above a suspended ceiling.2.

Contact Easy Heat Technical Support

Call Easy Heat directly and explain the situation. Ask them if the cord is acceptable for use above a suspended ceiling according to the NEC, and if they have any documentation to support that. Get their answer in writing if possible.3.

Alternative Wiring Methods



Direct Wiring

The best solution is likely to eliminate the flexible cord entirely. Have a qualified electrician: Install a junction box near the drain pipe. Hard-wire from the junction box to the heat trace cable using appropriate wiring methods (e.g., conduit, cable suitable for wet locations). The electrician can then install a GFCI receptacle at the junction box.

Conduit to Receptacle

Instead of running the flexible cord through the ceiling, install conduit from a point below the ceiling to the receptacle above the ceiling. This provides physical protection for the wiring.4.

Code Interpretation with the Inspector

Have a respectful and open discussion with the electrical inspector. Present your documentation, explain your understanding, and be prepared to compromise. Sometimes, inspectors are willing to consider alternative solutions if they are well-reasoned and provide equivalent safety. Ask for the specific NEC code section he is referencing to deny the installation, and then get a better understanding of his reasoning.5.

Consider a Variance (if applicable)

In some jurisdictions, you can apply for a variance from the strict interpretation of the code if you can demonstrate that the proposed installation provides an equivalent level of safety. This is usually a last resort.

Important Considerations
Safety First

Always prioritize safety and code compliance. Don't try to cut corners or argue for an unsafe installation.


Qualified Electrician

All electrical work should be performed by a licensed and qualified electrician who is familiar with the NEC and local codes.*

Documentation is Key:
Keep all documentation (installation instructions, UL listings, communications with Easy Heat, code interpretations) organized and readily available.By thoroughly researching the Easy Heat documentation, understanding the NEC requirements, and working with a qualified electrician and the electrical inspector, you should be able to find a solution that meets both code requirements and your project needs. Good luck! Flag for review

Previous Question View on the official Mike Holt Forum Next Question