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Separately Derived System Bonding Calculator

SDS bonding jumper per 250.30(A)(1) via Table 250.66. 1 input, 1 output.

Inputs

Derived system

Largest derived phase conductor.

Result

Bonding jumper (AWG code, -1=1/0, -2=2/0, -3=3/0)
Waiting for calculation.
Screening calculation only. Verify against NEC articles cited on the page and the equipment nameplate; the authority having jurisdiction governs.

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DC Voltage Drop Calculator

NEC Table 8 resistance drop for 24V DC control runs with gauge picker, material and limit verdict. 9 inputs, 5 outputs with grouped results.

Outputs: Voltage drop · Drop percent · Voltage at load

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