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HotLine

Product Specifications

The design of the “HotLine” presents a much safer alternative to the traditional mineral filled in pipe heating elements that operate on 120 or 240 Volts (V) of Alternating Current (AC).

Instead, the “HotLine” heating element operates from a safe voltage of 6, 12, 24, or 30 Volts AC transformers depending upon the length of the selected heating element.  Note that these are similar voltages used by the most common model railroad trains.

The “HotLine” heating element consists of a heavy gauge wire of a modern resistance alloy encased in a 1/4 inch diameter copper or plastic tube.  At a design power of 3 watts/foot and element lengths from 6 feet to 100 feet, the shortest “HotLine” dissipates approximately 18 watts while the longest dissipates approximately 300 watts.

At 3 watts/foot in free air, the temperature of the heating element rises to approximately 100 degree F.  Note that this is only 1.4 degrees higher than normal human body temperature.

Depending upon the length of the heating element, the “HotLine” power center provides Class 1 Power-Limited Circuits of 25 VoltAmps (VA) to 500 VA for the selected “HotLine” heating element per the definitions and requirements of applicable articles of the National Electric Code (NEC) Latest Edition.

The power center consists of a Underwriters Laboratory (UL) approved metal enclosed transformer unit with it’s 120 Volt primary protected by a UL recognized fuse holder and fuse.  The fusing for each of the different transformers is per the applicable articles of the NEC Latest Edition.

The approved and recognized cord with grounded plug will be provided with the power center box.

The “HotLine” power center cord shall be connected to the “HotLine” heating element, after installation, with the UL approved/recognized cord provided.  The “HotLine”power center cord and the “HotLine” heating element shall be connected within the provided LB Conduit Body.  The connections of the “HotLine” power center cord wires and heating element wires shall be offset to prevent short circuiting.

Submitted by,


Jerry B. Hoffer
BSEE, Purdue University, 1961   
“HotLine” Electrical Consultant

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