In those videos a load cell to test an Arc welder is built using a very large low resistance, high-current air-cooled resistor. That is the "coil" you are referring to. In addition, there is a voltmeter, and a 0 - 200 Amp Ammeter - which is of course using a substantial shunt.
The load resistor will be made of a high-resistance heatproof alloy, such as nichrome, and has to dissipate 3- to 6- kW.. I have no idea where to obtain such an item.
For a simpler alternative, Google "hillbilly load bank" :
https://www.facebook.com/5mweldingc...put-297-amps-from-a-stocks-m/563264813823854/
Two electrodes in a large bucket of very salty water. Then just check the current with a clamp-on DC ammeter. Watch out for the chlorine...
The load resistor will be made of a high-resistance heatproof alloy, such as nichrome, and has to dissipate 3- to 6- kW.. I have no idea where to obtain such an item.
For a simpler alternative, Google "hillbilly load bank" :
https://www.facebook.com/5mweldingc...put-297-amps-from-a-stocks-m/563264813823854/
Two electrodes in a large bucket of very salty water. Then just check the current with a clamp-on DC ammeter. Watch out for the chlorine...
