[Electric engineering.] . Pig. 1. Fig. 1 shows a gas pipe that was melted by an arc causedby a heavy current-carrying circuit crossing a signal cir-cuit that was connected to the pipe. The connection to thepipe was poor and Fig. 2. Fig. 2 shows joints made with No. 10 wire on a circuitdesigned to carry 200 amperes. The use of such a poor joint gave rise to heating thatresulted in the burning out of thewire. Fig. 3 shows a fixture canopywith a hole melted through it,caused by a fixture cut-out in-side the canopy becoming short-circuited. Fig. 4 shows a burn-out caused by a short ci


[Electric engineering.] . Pig. 1. Fig. 1 shows a gas pipe that was melted by an arc causedby a heavy current-carrying circuit crossing a signal cir-cuit that was connected to the pipe. The connection to thepipe was poor and Fig. 2. Fig. 2 shows joints made with No. 10 wire on a circuitdesigned to carry 200 amperes. The use of such a poor joint gave rise to heating thatresulted in the burning out of thewire. Fig. 3 shows a fixture canopywith a hole melted through it,caused by a fixture cut-out in-side the canopy becoming short-circuited. Fig. 4 shows a burn-out caused by a short circuit betweenweather- proof wires used in molding. Wire with weather-proof insulation only fig. 3. should never be used in molding,


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