In the referenced posting
Quote:
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This is correct. If you have five glow plugs, each with a cold resistance of .5 ohms, each plug will flow 24 amps. 5 plugs in parallel will flow 120 amps. Since the fuse is rated at 80 amps, the plugs must immediately increase in resistance within seconds of the current application to prevent the fuse from melting.
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it assumes that the battery voltage remains at 12V. It also ignores the resistance of all wiring involved.
It is highly unlikely that the current draw of GPs would actually be 120A, given the resistance of the wiring from battery to GP relay & to GPs.
If anyone has tested the current Vs Voltage applied to these GPs, over say 30 seconds, in a W!23 (for example) I would be very interested in the measured values.