What is the purpose of the Cable Size Calculator mentioned in the article on automotive wiring FAQs, and where can I find it?

Amperage and Wire Gauge Chart: What Size You Need - The Spruce

You can consult the wire ampacity chart from the 1st Chapter and see that the most appropriate wire size for 80 amps is 4 AWG wire. Belden Master Catalog, 2006, although data from there for gauges 35 and 37–40 seems obviously wrong.Current (ampacity) Notes: The current ratings shown in the table are for power transmission and have been determined using the rule of 1 amp per 700 circular mils, which is a very conservative rating. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. This property can be employed to easily find the AWG of a stranded bundle by measuring the diameter and count of its strands.

Wire Size Chart and Maximum Amp Ratings - Wire Size Calculator

If you’re looking for wire size for a 30 amp circuit (this can be for a 30 amp 220-volt circuit, breaker, battery output), you will need an AWG with at least 30 amp rated ampacity at 75°C. If you are wiring to a panel, you can not use a wire smaller than 14 AWG on a 15 amp circuit, 12 AWG on a 20 amp circuit, and 10 AWG on a 30 amp circuit. United Kingdom (Deutsch, English) (Nederlands, français, English) (Português) (Български) (English, français) (简体中文, English) (čeština, English) (dansk, English) (eesti keel) (suomi, English) (français, English) (Deutsch, English) (magyar, English) (English) (English) (Italiano,English) (한국어) (latviešu) (lietuvių k. Formula for calculating the cross-section (Area; An) of an AWG wire (n denotes the AWG gauge number).ASTM B258-02 also dictates that wire diameters should be tabulated with no more than 4 significant figures, with a resolution of no more than 0. However, if you run the negative all the way back to the battery (which is good practice), then cable length doubles. In the North American electrical industry, conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1kcmil = 0. If you’re looking for wire size for a 200 amp circuit (this can be for a 200 amp 220-volt circuit, breaker, battery output), you will need an AWG with at least 200 amp rated ampacity at 75°C. gauge electrical wire can also be used as an 18 gauge stranded wire; for thermostats wiring, for example.