using a hard drive connector for heater/bed could be dangerous switch for atx +4 12 connector

[terramir]

the one wire that carries 12V is too much constant current to be safe I already burned the wire twice lost one connector on both the psu and board, if you replace the hd connector with the 12V cpu 4 pin connector you halve the current per wire and hence ensure the wire does not burn up and the atx +4 cpu connector is made to handle quite a bit more that 10A @12v it actually can handle a max of around 12A per contact, and if you can find gold plated ones even 13A per contact. using the hard disk connector in future will cause problems not just for me. it can cause a fire hazard for anyone. should be a 5 min job to change the connector on the pcb layout they connector has a 4.2 mm pitch and it would solve alot of problems
terramir

[Traumflug]

This topic comes up every now and then and the answer is: these two wires of the ATX4 connector are specified for the same current as the one of the disk power connector. (Edit: reference to the ATX powersupply design guide removed, this paper doesn't discuss allowable curretny per connector)

If you want something really thick, swap the 5V wire of this connector with the 12V one of the third disk power strand. Then, add a wire on the copper side to make use of this formerly unused pin.

[Traumflug]

Discussion follows in the RepRap wiki: http://forums.reprap.org/read.php?181,134736