Most Christmas lights today use a parallel wiring system. Parallel wiring provides more than one path of electricity for each light bulb to follow. The parallel lights have two wires and each light bulb has its own positive and negative wires.. With a parallel wire system if one light bulb burns out the rest of the lights remains on.
Safety Instructions for Christmas Lights.
To reduce the risk of overheating the lights, you should always replace any burned out light bulbs promptly. The voltage of the light strand does not change when another set of light strand is added. This increase in wattage increases the amount of current that passes through the electrical wire and light bulbs. Too much current flowing through the electrical wires and the light bulbs will cause excess heat causing the light bulbs to burn out sooner. Most Christmas lights have fuses to limit the amount of current that passes through the light strands. Over heating of the electrical wires may cause electrical fires.
When using Christmas tree lights these basic precautions should be followed.
1. Holiday Christmas lights are not intended for permanent installation or use.
2. Do not let the Christmas holiday light bulbs rest on the light string supply cords or other electrical devices.
3. Unplug the lights when leaving the house, if the Christmas tree lights are left unattended or when retiring for the night.
4. Do not cover the Christmas holiday light bulbs with paper, cloth or any other material.
5. Always unplug your Christmas lights before installing or replacing the Christmas light bulbs.
6. If your Christmas lights are equipped with push-in type bulbs, do not twist the light bulbs. Pull the light bulb straight out of the light socket.
7. If you're Christmas lights are equipped with the threaded screw in bulbs. Use the proper light bulbs with the same voltage and wattage.
Christmas Lights With Overload Fuses:
A blown fuse indicates an overloaded circuit. Reduce the number of light sets that are connected to the circuit. 1.) Always unplug your lights before installing or replacing the fuses.
2.) To avoid the risk of fire replace the blown out fuses with the same amp and volt fuses that were provided with the original holiday lights.
3.) Slide the light fuse cover closed so that all fuse metal tabs are latched into place.
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