Technical Information

Electrical Data: Connections and Wiring

Typical Heater Connection

Parallel

Cartridge Heaters are usually wired in a simple parallel connection. Heaters are rated at applied voltage.

Parallel (Single Phase)

Cartridge heaters may be wired in series.

  1. To reduce wattage in a system, two heaters rated at 240V wired in series will reduce the total wattage to 1/4 of its rated value when 240V is applied. Three similar heaters wired in series will reduce wattage to 1/9 of its rated value.
  2. For use at higher voltage - two 120V heaters wired in series for use on 240V, or two 240V heaters wired in series for 480V.

3 Phase Delta

The most commonly used method of making 3 Phase connections. The heaters are arranged in multiples of 3 for a balanced system.

Typical Heater ConnectionTypical Heater Connection
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