https://diy.stackexchange.com/questions/172487/15a-air-compressor-blowing-15a-breaker/172490#172490. There is nothing else on the circuits in question. I got a used air compressor rated at 15A (120V). The manual for the IR air compressor calls for 3x the FLAs. Horsepower (hp) is not an accurate way to size an air compressor. Better yet, is this a good time to convince my wife I need a better clamp meter? If it is running on 120 volts, and the name plate of the motor says it can be wired for 240 volts AND 2) You know this circuit. That seems a little ridiculous, but we see this every day in the world of air compressors. If you see the words “peak hp,” on anything you can completely ignore that horsepower rating – it means absolutely nothing. Finally, I am not doing anything dumb like using an extension cord--the 6'/2m cord and NEMA 5-15 plug are clearly factory and in good condition. You'd think the most common time to trip might be when the compressor motor cuts in, but it actually trips mid-way through the 2nd or 3rd cycle. If you see some other hp rating than that, like 6.5 hp or 9 hp, then you know some creative labeling has been applied. List Price: 1083.00. Do I need to run a new circuit and 20A breaker? Sold in Stores Eaton 40-Amp 2-Pole 24V Definite Purpose Contactor. VacLife Tire Inflator 12V. I have a used Ingersoll-Rand air compressor I need to supply power to. Good reminder to check the motor wiring itself, though. What are your symptoms?”. Baomain Mini Circuit Breaker NXB-63 D63 AC 400V 63Amp 3 Pole DIN Rail Mounting Work for Motor Protection and Air Compressor $15.69 $ 15 . It’s not just the consumer world either. Those cheapo ones give you an estimate, but they're not exactly accurate. VEHICLE WIRING INSTALLATION. California Air Tools 15 Gal. Or do I need to look for a fault in the compressor? The breakers were installed before I bought this house, and have seen minimal use (previous occupant was a renter who had a small fridge plugged in to one circuit, and probably never used the other. On the emergency power side, you can keep the refrigerator running along with lights, fans, or even a window AC unit. Sullair 7509: 90.3 kW – 444 SCFM at 125 psi Thank you! Breakers can do this when you put them "on edge" for extended periods of time. TEMPLATE AUTO PUMP 5 3/16" 3 1/2" 1 3/4" 3/16" DIA. This is a great example of how useless the horsepower rating is. You're compressor is stressing that breaker out and making it trip. 89 I may be able to find out. Sku # 3673452. To my ear, it sounds absolutely normal and then just quits when the breaker trips. Compressors are “hard starting” which means the starting amps are over double the full load amps listed on the motor. Before you wire a 230V air compressor, you should always check the manual for the proper wire gauge. As an example, a 100hp motor and 95% efficiency would need input kW of 78.5kW. 100 hp is 74.6 kW. 3 gallon 1/3 HP 100 PSI Oil-Free Pancake Air Compressor $ 54 97. So the Kaeser “25hp” is closer to 30hp and the Ingersoll Rand “30hp” is really 35 hp. (max 2 MiB). Accessory USA AC/DC Adapter for Vector Power On Board 450 AMP Jumpstart VECO12POB Jump Starter Air Compressor Power Supply Cord 4.0 out of 5 stars 10 $15.89 $ 15 . When you ask for a compressor based on horsepower, what you are doing is very similar to pharmacy situation described above. Thanks! Do you want aspirin, Tylenol, NyQuil, Claritin, or maybe some antacid? All rights reserved. For DC power supply, watts are equal to amps times volts. Multiply the wattage by the running time to determine … Map and Directions, Copyright Air Compressor Works © 2020. our review board Article reviewed on Jun 29, 2020 And it definitely draws 14.3 ~ 14.8A. Now let’s convert kW to hp. So basically it takes double the amount of hp for a gas or diesel engine to do the same amount of work that an electric motor does. Here is a good explanation of why. Otherwise, youre heating the wire due to the amount of current that's traveling through it, as compared to what the equipment needs to run properly and safely. Atlas Copco GA-75+: 88.2kW – 482 SCFM at 125 psi. Expert: Ok, you will run this compressor wiring to the panel and hook it up to a double pole 30amp breaker. If your wiring is #14 going to this air compressor, you can not put any larger breaker on this circuit than a 15 amp. Can you shoot a photo of the nameplate on the motor? Retail Sears compressor (Canada) Craftsman model 919.721920. Through igonorance, I assumed it would require two 110 circuits and pulled red, black, white, & ground 12 AWG stranged. Ace Industries: Cranes, Hoists, Come Alongs, Gantry Cranes, Jib Cranes, Davit Cranes, Winches, End Trucks, Lifting Slings and Bridge Cranes Powermate® 6 ft. 230-Volt 15-Amp Power Cord. The compressor itself is a Craftsman model 919.721920. https://diy.stackexchange.com/questions/172487/15a-air-compressor-blowing-15a-breaker/172508#172508. The cord and plug are factory and in good condition. Electric 10 items; Gas 9 items; Free Shipping. So what about the 230V compressors that they sell at a big box store or automotive store? Just to check the kW on both: the UP6-30 is 28.7 kW and 92.4% efficiency (35.5 hp), and the AS-25 is 23.3 kW and 91.7% efficiency (28.7 hp). Additionally the hp rating only tells you rating of one component of the package. The other thing that this could be is there's a problem at the motor connection junction box, on the motor itself, informally known as the " pecker head ". eCompressedair.com is working hard to be the easiest and most reliable source for you to find all your aftermarket replacement air compressor parts and repair kits. Kaeser CSD-100S: 76.3kW – 417 SCFM at 115 psi Your submission has been received! The 40 amp breaker would only be slightly less than 3x rule. It seems to me that something that takes 15 amps continuous would need a 20 amp … It’s not just compressors where you’ll see this, there have been several class action lawsuits where manufacturers were giving “peak hp” ratings. Thanks. Air compressors for home use and small business tend to greatly exaggerate their hp ratings, while air compressors targeted toward larger industrial customers tend to give you more horsepower than what’s on the label. @Harper The motor itself is covered by a plastic shroud that seems impossible to remove without damaging it. There was one which involved air compressors, as well. Run the 10-gauge 3-conductor wire into the box. My clamp multimeter is terrible (updates very slowly), so I can't see transients very well, but the compressor does appear to draw around 14.5A when the motor is running. The motor efficiency rating is line 7 in the CAGI data sheets. 85.9kW x .954 = 81.9kW = 109.8 hp Shop a large range of 15 amp air compressor at MSC Industrial Supply. The wiring procedure may or may not call for a neutral wire. Sometimes it’s just a 15 amp breaker (1800 watts or 2.4 hp). I would definitely test it with a 20A breaker - safely though... 14.5 amps is a little high for an appliance that shipped with a NEMA 5-15 plug. Also, you have to factor in motor efficiency. In my garage, there is a 20 amp GFI outlet, and the circuit breaker to my garage is also 20 amps. 2 Gallon 135 PSI Ultra Quiet Hand Carry Jobsite Air Compressor. I would expect less than 12. You're not supposed to run breakers at limit. Kaeser CSD-100: 89.8kW – 496 SCFM at 115 psi Please visit a Menards store for information and to purchase. watts = 15A × 12V = 180W ï
A 110-volt compressor drawing 15 amps uses 1,650 watts (110 volts x 15 amps), while a 220-volt compressor drawing 15 amps consumes 3,300 watts (220 volts x 15 amps). Also, the Kaeser gives you more flow at the same pressure with about 7 less hp. Add To List Click to add item Eaton 60-Amp 120/240 Outdoor Air Conditioner Disconnect to your list. Minimum Circuit Ampacity. 87.3kW x .945 = 82.5kW = 110.6 hp 1956 W 9th StRiviera Beach, FL 33404Monday â Friday 7:30 AM - 4:30 PM 76.3kW x .95 = 72.5kW = 97.2 hp All 230V appliances must be connected to a dedicated circuit powered by a double-pole circuit breaker with the proper amperage rating. The new version can give you 120 SCFM at 125 psi. Compare that to the Ingersoll Rand 30 hp UP6-30, which gives you 117 SCFM at 125 psi, and they call it 30hp. I've seen this occur before. Rating: 0%. Go to Home Depot and Lowes, and you might see compressors that plug into your wall that say 5hp or 6.5hp. 89.8kW x .95 = 85.3kW = 114.4 hp Additionally the horsepower of the motor doesn’t tell you how efficient the pump is or anything about any of the other components that may affect the compressor output. Remove the cover from the fuse box and install a 30-amp 220-volt circuit breaker for the compressor. 90.3kW x .954 = 86.1 kW = 115.5 hp Oops! The specs I gave in the OP are from the plate on the tank. Gardner Denver Saver II ST 100: 89.5kW – 450 SCFM at 125 psi Good thought to test it first, although I'll probably just upgrade one of the circuits anyway, as that has been the plan all along. 3. Optional switch and fuse can be installed as shown (use 20 amp rated switch and 15 amp SLO-BLO fuse). It has a true 5 HP motor that says it takes 15 amps 230 volts on the motor data plate.
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