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[Barrbeast]

Originally Posted by solarman216

Rob my old mate, do not confuse 6mm with 6Mtr Rick

6mtr length Rick can't remember the wire gauge just that they're welding cable and pretty thick.

[macabethiel]

Originally Posted by solarman216

Think you are like me getting forgetful on numbers, 6mm is only good for 50amps 50 mm is good for 345amps but at 6 Mts long will carry less, Rick

Now you have me thinking mine are about 6 feet in length, when I get them back I will check the O.D. of the cable in my mind it was around half an inch including insulation so I guess they must be nearer the 9-10 mm mark. As they are so old could they be a higher copper grade with more strands?

[Lazy-Ferret]

Don't forget that the cable size Rick is mentioning, is given in cross sectional area, so a 50mm2 cable has a conductor of 8mm diameter, and then the insulation on something like welding wire will take it out to about 13mm outside diameter.

6mm diameter conductor sized wire will be the equivalent of about 30mm2.

[macabethiel]

Originally Posted by Lazy-Ferret

Don't forget that the cable size Rick is mentioning, is given in cross sectional area, so a 50mm2 cable has a conductor of 8mm diameter, and then the insulation on something like welding wire will take it out to about 13mm outside diameter.

6mm diameter conductor sized wire will be the equivalent of about 30mm2.

3.142 x r squared cant do the symbol for 22/7 !

[Lazy-Ferret]

Originally Posted by macabethiel

3.142 x r squared cant do the symbol for 22/7 !

It's not as simple as that, as the conductor is made up of multiple round strands, and in order for the cable to bend, they need to not be too tightly packed together. It's also affected by the size and how many individual strands there are, that's why you buy cable by area, not the conductor diameter and why the conductor size is bigger than the logical size using that calculation.

[macabethiel]

Originally Posted by Lazy-Ferret

It's not as simple as that, as the conductor is made up of multiple round strands, and in order for the cable to bend, they need to not be too tightly packed together. It's also affected by the size and how many individual strands there are, that's why you buy cable by area, not the conductor diameter and why the conductor size is bigger than the logical size using that calculation.

Yes the interstitial spaces didn't think about them !