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To limit current, an incandescent light bulb works as a thyrister; that is, it comes on and becomes a resister at higher curents. Serves to make you aware of a problem and protects circuits. On the old Marnold throttles we used a 25 Watt household lamp and that limited current to about 2.5 amps. (You can use any 25 Watt incandescent lamp that will suffer more than 16 volts.) I like this arrangement better than a circuit breaker because it resets as soon as you remove the short. It is best to locate the lamp near the power source or the current sensitive elements.
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