eb11 Posted May 17, 2014 Posted May 17, 2014 what diameter nichrome wire is a good size to use to ignite visco fuse
Oinikis Posted May 17, 2014 Posted May 17, 2014 Well, it's resitance has to be higher than wires resistance. I've got mine from old hair drier, and it's like 0,2mm, works fine for me, using 12v
Arthur Posted May 17, 2014 Posted May 17, 2014 it's a fine line between being to hot and quickly burned through and too fat and never heating. Depends a lot on the lead lengths to the battery. 50 wire gauge is for fast igniters 30 gauge wire is probably better for non pyro igs, anything finer uses a lot of current. Get a decent battery on short wires.
Bobosan Posted May 17, 2014 Posted May 17, 2014 Also helps to coat any electric igniter with a pyrogen.
Arthur Posted May 19, 2014 Posted May 19, 2014 Pyrogen helps pass fire BUT in places where these should be for professional use only, having "home user" hot wire igniters is nicer. A pyro igniter tends to need about 50gauge wire, to light a pyrogen, with about 500mA for about 20ms.A wire igniter tends to need fatter wire (about 30g) no pyrogen, and take an amp or more for up to half a minute.- these need the cable to carry the current without excessive volts drop.
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