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This article was co-written by Ricardo Mitchell. Ricardo Mitchell is general manager of CN Coterie, an EPA-certified construction company based in Manhattan, New York. CN Coterie specializes in home improvement, electrical, plumbing, carpentry, furniture restoration, dismantling of OATH/ECB violators, and dismantling of DOB violators. Ricardo has more than 10 years of experience in the electrical and construction industry, his associates have more than 30 years of experience in the related industry.
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Cars and older homes don’t use modern circuit breakers, but use fuses to prevent damage from sudden surges. Sometimes these fuses need to be checked to make sure they are still in good working order. Testing a fuse with a multimeter is quick and easy.
Steps
Learn about fuses and multimeters
- Cylindrical fuses have been widely used for a long time in households to small electrical appliances. In terms of structure, the tube fuse has a cylindrical shape with a wire inside, outside the two ends of the tube are electrodes or metal contacts. [1] X Research Source
- Flat fuses have been widely used in automotive electrical systems for the past 20-30 years to replace small glass tube fuses. In terms of construction, a flat fuse resembles a plug with two metal prongs sticking out of the plastic housing containing the wire. The flat fuse can be conveniently inserted into the holder, while saving space if bulk connections are required. [2] X Research Source
- Multimeters have positive and negative probes. When testing resistance in a circuit, a small current is passed from the battery of the multimeter itself to measure the voltage passing through the circuit or device.
- The operation of checking fuses is simpler than with other electrical equipment. Other devices in the car or home include complicated wiring. In addition, most auto parts can only be checked in a garage and of course cost a lot of money. The process of checking fuses with a multimeter is relatively simple, and the measuring device is also cheap and easy to use.
- Various shaped fuses make it easy for the user to determine the condition just by appearance. They are designed to be transparent and you can see if the wires are intact. If the transparent material is tinged with black smoke, it’s usually a blown fuse. However, some types of fuse easily turn black after a little overheating, and that could be the result of a failure that was not checked a few weeks or months ago. If electrical equipment stops working, you should check the fuse. If the fuse is working properly then there is a chance that a more serious problem is going on and you need to call in a professional.
Check the fuse
- To measure ohms, you can set the multimeter to the mode with the symbol omega (Ω).
- For a digital multimeter in resistance measurement mode, touch the two probes together to get the initial reading. Then, contact the probe with the two fuses to see if the readings change. If the reading does not change, the fuse is working properly. If the display has no reading or shows “OL”, the fuse has blown.
- In addition, the “Open” or “Not complete” status displayed on the multimeter also indicates a failed fuse.
Advice
- Today, home electrical systems are not merely protected by fuses. Modern protective devices and circuit breakers rarely use fuses, but are safer. You might consider upgrading old installations to modern standards.
- Most cars use colored flat fuses. By looking at the transparent fuse plug inserted in the fuse box, you can judge whether the metal strip running along the top of the fuse is intact (good condition) or damaged (due to fire/explosion).
Warning
- Never replace a blown or poor condition fuse with a higher rated fuse. The rating is intended to ensure that below rated current can safely pass through the conductor. Always replace old fuses with fuses of the same (or lower) rating.
- Never check a fuse on an appliance that is on.
This article was co-written by Ricardo Mitchell. Ricardo Mitchell is general manager of CN Coterie, an EPA-certified construction company based in Manhattan, New York. CN Coterie specializes in home improvement, electrical, plumbing, carpentry, furniture restoration, dismantling of OATH/ECB violators, and dismantling of DOB violators. Ricardo has more than 10 years of experience in the electrical and construction industry, his associates have more than 30 years of experience in the related industry.
This article has been viewed 3,421 times.
Cars and older homes don’t use modern circuit breakers, but use fuses to prevent damage from sudden surges. Sometimes these fuses need to be checked to make sure they are still in good working order. Testing a fuse with a multimeter is quick and easy.
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