Heating element symbol
Also called Heater, Resistive heater, Heat tracing
A resistive heater. US drawings use the resistor zigzag; IEC uses a rectangle divided by lines.
ANSI / IEEE
IEC 60617What the heating element symbol means
A resistive heater. US drawings use the resistor zigzag; IEC uses a rectangle divided by lines.
ANSI and IEC symbols
Where you see it
Panel and anti-condensation heaters, process and electric heat tracing, and motor space heaters.
What is written next to it
On a schematic, the heating element usually carries its designator and power, such as E1 200 W.
Related symbols
Frequently asked questions
What does the heating element symbol look like?
On ANSI drawings: A resistor zigzag marked HTR. In IEC 60617: A rectangle divided by three lines.
Is the heating element symbol the same in IEC and ANSI?
No. A rectangle divided by three lines.
Where is a heating element used?
Panel and anti-condensation heaters, process and electric heat tracing, and motor space heaters.
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