Voltage Drop Calculator - ABYC Amperage Tables

Below you'll find a few helpers along the way to properly sizing your wire or cable. As we are primarilly marine focused we have added some tables regarding the amperages as suggested by the ABYC for the marine environment. These standards might be a bit more strict then those in the automotive environment however, they err on the side of caution and were developed with safety in mind.

The volatge drop calculator will allow you to find the percentage of voltage drop as well as the current delivered at the end of the wire run. In the boating world it is suggested:
3% max voltage drop for conductors providing power to panels and switchboards, navigation lighting, bilge blowers, main DC feeders, and any other circuit where voltage drop should be kept to a minimum
10% max voltage drop on conductors used for general lighting and other non-critical circuits

The ampacity (amperage) tables help to choose the correct size cable to handle the power load for which you are trying to find the correct wiring. There are individual tables for single conductor and multiple conductor runs as current carrying conductors which are bundled together will transfer heat to each other in effect reducing their safe current handling capabilities.

Source: Genuinedealz Home

Voltage Drop Calculatordesigned by Gerald Newton

Allowable Amperage of Current Carrying Conductors under 50V as suggested by the ABYC

Select Copper or Aluminum
Select Wire Size
Select Voltage
Enter 1-way circuit length in feet
Enter Load in amps

Voltage drop
Voltage at load end of circuit
Per Cent voltage drop
Wire cross section in circular mils

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