I am confused by the differing opinions. NO, dont change the breaker sizing.

I’ve seen units under this same scenario (25 amp nameplate) that would cause nuisance trips when a 25-amp breaker was installed and when the 30-amp breaker was put in the trips stopped and there were never any problems. Also shud we install one the heats too.

Ask Question Asked 6 years, 11 months ago. I use the simplified chart above to help determine this. The Air Conditioner Specifications Tell It All Electrical Question: I need a 2 pole 20 amp breaker for my panel box. 46. They replaced the unit and didn't replace the breaker. Tighten the screw down on the wire. These receptacles can help you determine if the outlet you plan to use for your air conditioner is sufficient or if it requires installation by an electrician.

Route the white neutral wire to the panel's neutral bar.

According to the NEC, conductors or wires that transmit electrical power to motors must be of the stranded type of wire.

Our 20th year anniversary is May 21, 2020. I mentioned that the minimum wire size for this air conditioner would have to be 8-gauge, and a 60-amp circuit breaker would normally be too large for that size wire... but it doesn't matter. These units all have a label applied to them that tells us the minimum circuit ampacity, and the maximum fuse or circuit breaker size. When an air conditioner overheats, it draws more amps (a measurement of electrical current) from the circuit. now putting a 60 or a 100 on 8 gauge would be cause for concern. Yahoo ist Teil von Verizon Media. Slip the stripped ends under the terminals and then tighten the terminal screws to secure them in place.

Large motors and air conditioners separate these overcurrent functions. Take a look around any room full of home inspectors, and you'll notice we look a lot alike. That may be pushing the circuit past the number of amps it was meant to handle.

There is zero educational content in this post. However, if the overcurrent device is sized to protect the wire against overloads, the device might trip, and the machine would not be able to start. If you aren’t sure what you need, consult a professional who can advise you.

Slide the cable through the cable connector on the side of the panel box and secure in place by tightening the two clamping screws on the connector.

THE MOST LOGICAL is read the name plate as others have said. If the label simply states “maximum sized over current protection” then any form of overcurrent protection may be used. The max-rating for the appliance is the maximum allowable fuse/circuit breaker.

We have helped countless customers shop for high-quality items -- from air conditioners, to heating units, to water heaters, and more -- and have set up this blog as an extension of our commitment to helping homeowners become informed of the things that matter to them. CKT BKR. Ask Our Pros-Owner Assistance - NO DIY advice will be given. If it keeps tripping, then something is wrong!

The wire is protected against overloading by a separate thermal protection inside the compressor. If it says 34 amps, like in the example below, we need 8-gauge wire. If the label calls for fuses, there MUST be a fuse in the disconnecting means, not a circuit breaker. Consider the range of power requirements between central air and window units, and how those differences in voltage can affect the outlet you will need. Biden pushes closer to victory in race for the White House, Twin Cities ICU space 'at red alert' as virus cases hit record, Minnesota voter turnout of almost 80% could break records, Hundreds of protesters arrested after marching onto I-94 in Minneapolis, Noor appeal arguments in Damond shooting focus on definition of 'depraved mind', Joe Biden cements DFL's strength in Minnesota cities, big suburbs, The wait over next president is agonizing, both sides in Minnesota agree, Minnesota Legislature on track for more divided government, What does it all mean?

Please help! What size breaker and wire do I need for central air conditioning? To make it short and sweet, the answer is soot, and it's usually caused by candles and thermal bridging. Your email address will not be published.

Wiring a 2-pole circuit breaker for an air conditioning system requires working inside the service panel, where the main panel lugs will still be electrified even with the main service disconnect breaker turned off. All Rights Reserved. Straight from nec (if start current trips ocpd you may use the next size ocpd not to exceed 225%max of nameplate provided the ocpd does not exceed conductor rating all of this is mute if using hacr breakers which allow overdraw for a few tenth of a sec or even better stick with nameplate and throw a hard start cap in the mix also as someone else hinted to if the disconnect has a ocpd that is rated at nameplate spec than the primary breaker is only for protection of the conductor. Finally, do some planning before you shop. Also consider that the condenser may have internal wiring matched to the Max Fuse/Breaker Rating indicated on the label, and an older oversized breaker may not trip if the compressor motor locks up … which could complete fry the equipment … :shock: http://www.nachi.org/bbsystem/viewtopic.php?t=15285, IMO report it as a defect needing evaluation/repair and call it a day …

Hard to breathe right? Also you would use the nameplate data (MCA and MaxOCPD) which exists on all modern equipment to determine the conductor and OCPD size. It is for the wire to my air conditioning unit. Can I run a 5 kw split system off a wall socket no circuit breaker, Hi, I’m looking for a wall sleeve a/c to cool my studio, which is approximately 500 square feet. The minimum circuit ampacity also tells us the minimum size of the circuit breaker; it needs to be sized large enough to help prevent nuisance tripping when the air conditioner first turns on. Powered by Discourse, best viewed with JavaScript enabled. Well DAn that home inspector has NO CLUE what he is talkig about. ". Thankfully, this simplified chart works for most of the stuff I come across as a home inspector. None of them will change the breaker when called out to confirm this. Here at Total Home Supply, we carry plenty of units to choose from, so you can be fully prepared to beat the summer heat. When a wire is too small for a circuit breaker, you have a potential fire hazard. What’s the Difference Between Voltage, Amperage, and Wattage? Motor circuits get around this problem by dividing the two separate functions of an overcurrent protection device.

I also am getting the impression from this thread that it is not OK.

IF something were to happen while it is in its warranty stages, it could void the warranty. The maximum allowed by the manufacturer of the equipment. My electrical inspector likes the way I do it so it must be ok. Enjoy!

CKT.

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