![]() ![]() You'll just have to make sure the disconnect is rated for greater than 25 amperes, and the appropriate voltage. You could go with larger wire (10 gauge), but not smaller (14 gauge). Usually the disconnect is not fused, and simply functions as a safety disconnect. Assuming youre in the US, the minimum you would need based on the nameplate info would be 12/2+ground (12 gauge wire with 2 conductors and a ground wire). However, you'll have to choose a device with a high enough rating to handle the inrush current, so you'll want to choose a device close to this value.Ī 30 ampere breaker is the wrong one, if the nameplate lists 25 as the maximum rating of the branch-circuit short-circuit and ground-fault protective device.įor 25 amperes, you're likely correct to use 10 AWG cable. You'll simply use the minimum supply circuit conductor ampacity value from the name plate, and NEC 2011 Table 310.15(B)(16) through Table 310.15(B)(19) to determine the proper conductor size.Īs for the branch-circuit short-circuit ground-fault protection, you'll have to select one less than or equal to the maximum rating listed on the nameplate. Maximum rating of the branch-circuit short-circuit and ground-fault protective device Belts & Cooling Brakes & Wheel Bearings Chassis & Steering Drive Train Electrical Engine Exhaust & Clutch Fuel & Emission Heating & Air Conditioning Ignition &.Minimum supply circuit conductor ampacity.Have it checks by a tech – yeah, it cost money.In the US, it's required that manufacturers include the following items on condensing unit's nameplate (NEC 440.4(B)): If you put fuses in and it blows, don’t put anymore fuses. The reason it blows fuses could be: the condenser unit is short to ground, electrical wire is loose, high discharge pressure, bad compressor.etc If the condenser unit is blowing fuse, there is part within the condenser unit which is pulling more than it Amps. By ChesterĬondenser unit blow fuses right away. Your technician needs to check the "Y" circuit for a short. Sounds like you have a short between the outdoor unit and the control board on the air handler. Changed stat wires and it still blows the fuse. The air handler will run if there is no power to the outside unit. 40 amp, labeled 'HTR' 3rd from lrft, above little fuses. This only happens when the outside unit kicks on. location of fuse for air conditioner on 1991 toyota celica should it be the 10 amp or 40 amp fuse - Toyota 1991 Celica question. The 5 watt fuse blows in the air handler. You likely will not hurt the system, but the 20 amp fuse will most likely open at the most inopportune time.” By Chester The fuses should be dual element, slow blow type. You should replace it with another 30 amps fuse. Other possible reasons include low refrigerant level, faulty capacitor, loose electrical cables, and faulty condenser fan. A clogged filter causes your A/C unit to work overtime and may result in a blown fuse. Could this cause the compressor to blow? The max amp is 30/30 on the AC cover If your air conditioner keeps blowing fuses, it could be as a result of a clogged filter. Is it ok to have 2 different size fuses in the outside disconnect box? I have a 20 amp and a 30amp fuse. Indoor unit has it owns fuse or breaker switch, the same for the outdoor unit.Ĭan I put two different Amp fuse in the fuse holder? Indoor and outdoor unit have TWO different fuses switch. ![]() The condenser switches are within the breaker box. If there isn’t disconnect box within REACH, there should be breaker box within 5 feet from the condenser unit. ![]() It is either a handle that you pull out, within this handler, there is two fuse in the fuse holder. ![]() 2 pack, 40 A, 250V, indicating fuse, Fusetron Dual Element, time delay, Current Limiting class RK5 fuse, label darkens if fuse has opened, applications, AC power distribution system mains, feeders and branch circuits, motors and motor branch circuits, transformers and other inductive loads, lighting, heating and other non-inductive loads. The within REACH disconnect is in metal box. Cooper Bussmann 2-Pack 40-Amp Time Delay Cartridge Fuse. Gegong Electric Disconnector,1pc 12V DC 40A Circuit Breaker Reset Fuse Resettable. The fuse for HVAC unit is Heavy duty time delay cartridge fuses. Ge - Industrial Systems TF60RCP 60 amp AC 2 Pullout Fuse Disconnect. The fuse box should be in the line of vision it should be within REACH from the condenser unit location. If any part of you draw more than 30 Amp, I’m gonna turn you off. Is a safety (device) that tells the HVAC unit, ok - you supposed to draw 30 Amp. An air conditioner fuse prevents any parts of HVAC to overload or overheat. ![]()
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