The polarity is generally indicated by a stripe at one end of the part.Ī device that opens up or "throws" itself to break a circuit when the current through it exceeds its designed limit. The voltage in your home is AC voltage, in the US typically 115V AC.Īn electrical component that stores electrical energy, with a specific storage capacityĪ capacitor often has a polarity and must be installed properly. Because low input voltages can also harm electrical devices or make them run erratically, most surge protectors will also turn the power off when the voltage is too low.Īlternating current reverses polarity and flows alternately in both directions in a circuit. A good surge protector should react faster than a breaker to voltage increases and kick out if the voltage exceeds the safe limit of your electrical equipment. The only real difference between breakers and a commercial "surge protection" device is that standard breakers are slow to react to voltage changes. Like surge protectors, they kick out if the input voltage goes too high. Your RV already has surge protection devices: your main AC breaker plus the individual appliance and equipment breakers in your main breaker panel. If you buy one, make sure you are purchasing a GOOD one. Surge Protector, Yes or No?Įveryone in campgrounds seems to be purchasing surge protectors these days. It will need to be on for you to get power. It is a small switch, often near the door on the inside. Most RVs have a master switch for disconnecting your RV's power during storage. Your on-board or portable generator can also be the cause of problems it may stop running if your vehicle's gas tank is less than 1/4 full. The converter itself has a fuse or two, often on the front. Check whether the connections to the converter are loose.A multimeter (see below) should show the voltage between the battery terminals between 13.4 and 14.5 volts DC if not, the battery may be worn out and need replacement, or it may be low on water, or the converter may not be giving it any power. Check whether the batteries are charged enough.When your battery is overworked or overheated the water tends to evaporate. This is the most common easy-to-fix problem. Check whether the batteries have enough water.Check whether the connections to the DC batteries are loose (see initial photo).Check whether the connections to the fuse or breaker box are loose.Check whether the fuse or breaker is tripped or not.You can so some simple investigation of the 12-volt system yourself, for example: Problems in the DC system can also cause lights or appliances to go on and off. The refrigerator and air conditioner, even running in propane-fueled mode or on AC power, require DC voltage for their logic circuits, and so may fail to operate when there is a DC system problem. A 12-volt problem can cause failure of other appliances and systems if they have 12-volt power to their controls. Troubleshooting 12-Volt System ProblemsĪ bad connection in the 12-volt system can cause failures of various appliances, including slides and lights which run on 12-volt power.
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