Can a one meter 50mm2 cable handle 350 amperes?
Of course the measuring is approximate since the cable is flexed.
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\$\begingroup\$ Continuously or for a short while? \$\endgroup\$– winnyFeb 15 at 10:26
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\$\begingroup\$ Well everything can handle 350A. The question is for how long it can \$\endgroup\$– PantheraFeb 15 at 14:07
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1 Answer
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No.
Source: https://www.powerstream.com/Wire_Size.htm
Size 0 wire, area 53.5 mm2: "Maximum amps for power transmission" : 150 A or 245 A (depending on the application) which is less than 350 A.
answered Jan 26 at 15:45
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2\$\begingroup\$ The same table says "Maximum amps for chassis wiring" for #0 is 245A, so it clearly depends on how the wire is being used and probably also makes some assumptions about the insulation's temperature rating. \$\endgroup\$– brhansJan 26 at 15:59
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4\$\begingroup\$ @user331438 Fundamental concept: length is irrelevant to current carrying rating (ampacity). Another fundamental concept: length affects voltage drop, not ampacity. \$\endgroup\$ Jan 26 at 16:29
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5\$\begingroup\$ @StainlessSteelRat "Impacts temperature". It impacts heat, not temperature. At a given current, the temperature is the same, regardless of length. Yes, a longer cable produces more heat, but it also dissipates more heat along a longer length. The two effect balance each other. The result is that the temperature is the same, regardless of length. It's simple thermal engineering. \$\endgroup\$ Jan 26 at 17:08
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3\$\begingroup\$ Not the downvote, but the OP is not concerned about power transmission but a one meter 50mm2 cable, which is a chassis wiring. \$\endgroup\$ Jan 26 at 19:34
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2\$\begingroup\$ This totally depends on application. This question is not answerable as written because application is not known. Inside a quadcopter is different than inside the walls of a structure. Duty cycle matters: Welder yes, EVSE hell no. Allowable thermal rating (on wires and application matter. 150°C wire inside walls hell no, inside equipment chassis probably. \$\endgroup\$ Jan 26 at 20:33