34 votes
Accepted

Inch-long block-and-spring part came with drill - what is it?

Those are replacement brushes for the electric motor in your drill. They are what make the electrical contact to the coil in the motor that spins, while also allowing it to spin. The rectangular part ...
user avatar
  • 4,772
31 votes

Did my installer give me the wrong overhead door springs or is my motor just too weak?

Your installer either does not understand how garage door springs work or he's lying to you because he thinks you're an idiot and will believe any crap he says. The facts are that the springs are NOT ...
user avatar
  • 20.3k
29 votes

Did my installer give me the wrong overhead door springs or is my motor just too weak?

Automatic door motors are optional. Every garage door is designed to work manually without a motor. You use your hands and a stick to push it up, and a rope to pull it down. The door action should ...
user avatar
26 votes
Accepted

Replaced Blower Motor, but A/C won't stay on unless power button is held down

I don’t think that is a power switch. That is a safety switch that is depressed by the cabinet panels when you put everything back together. It should not work unless it is depressed. You should be ...
user avatar
  • 234
22 votes
Accepted

How to quantify the difference in power of tablesaw motor rewired to 240 vs 120 volts

I don't know who is saying those comments or in what context they are saying, but I don't agree. If the motor is actually designed to be jumpered between 240V and 120V, then it should perform the ...
user avatar
19 votes

How do I run a 3 Phase/1hp TEFC motor off of a regular household outlet?

I'm sorry, but from the tone of your question, and the fact that you even suggest plugging this motor into a regular 15A receptacle tells me you are so far over your head your only valid option is to ...
user avatar
18 votes

Is okay to use commercial appliance inside average US home? For electricity spec: 115/60Hz/1 Ph (NEMA 5-15)

That's fine, they are nominally the same. 120v is utility supply defined by ANSI C84.1. 115v is point of use desired voltage, generally specified by NEMA. One is 120v +5/-10% tolerance, the other is ...
user avatar
10 votes
Accepted

Why are furnace/central AC blowers so inefficient?

Okay, so I think I figured out the reason, and I learned a lot about HVAC in the process. The answer is that a ceiling fan is moving air at basically zero "static pressure." Static pressure in an ...
user avatar
  • 12.2k
8 votes
Accepted

What tool/process do I need to remove this bathroom exhaust fan from motor?

The "small hole on the inner side" is a set screw. You will see that it lines up with the flat surface milled into the side of the shaft. You must unscrew it with a hex wrench, aka an Allen ...
user avatar
7 votes

Why has my ceiling fan's speed become slower?

Late response, but posting this for people that happen to google the problem... was probably a bad fan motor capacitor. You can find a replacement for a few bucks on amazon.
user avatar
  • 71
7 votes
Accepted

Why did my angle grinder die?

The Intermittent "sputtering" is sign of a loss of power going into the motor windings. there is pretty much only two ways this happens, A: there is a short somewhere (plug, cable or switch) or B: the ...
user avatar
  • 3,236
6 votes
Accepted

How do I re-wire a ceiling-fan to reverse its direction?

With another clockwise fan from the same maker, I was able to reverse the direction by interchanging the yellow and black wires as some answers here indicated. The explanation as I understood is that ...
user avatar
6 votes

Should I put a dimmer switch on a ceiling fan?

Use a fan control (dimmer designed specifically for fans) on the power supply to the fan. Common AC electric motors have a high low impedance on starting because velocity is 0, This draws a large ...
user avatar
6 votes
Accepted

converting HP to Watt

I thought there should be a time factor in this calculation Both watt and horsepower measure power. They are the same thing, just with different units, hence the direct conversion. You seem to be ...
user avatar
  • 1,785
6 votes

Cordless lawn mower briefly starts then cuts out

I have had 5+ batteries brought to me that show full charge to no charge but do similar or slightly less. In all of them they had been heavily discharged according to the owners. All of them had ...
user avatar
  • 95.4k
6 votes

Did my installer give me the wrong overhead door springs or is my motor just too weak?

Direct experience with exactly the same circumstances. The general understanding of door springs is that when disconnected from the track, the door should open without excessive force and should ...
user avatar
  • 9,293
5 votes

Can i fix or run my 110V pedestal fan on 220V?

Don't do it. Plugging the fan into 220V will draw twice the current and result in 4 times the power delivered to the motor, so it will spin like crazy. There is risk of overheating, fire, fan blades ...
user avatar
  • 171
5 votes
Accepted

Pool pump wiring - 115v motor okay with L5-20 125V 20A Receptacle?

1) American house-current power is commonly described as anything from 110VAC to 120VAC.(Similarly, the higher voltage obtained by using both phases is called everything from 220VAC to 240VAC.) I ...
user avatar
  • 16k
5 votes

How do I run a 3 Phase/1hp TEFC motor off of a regular household outlet?

My understanding is that I need a 1 phase(household) to three phase converter to do this. Yes. Usually these are used if you need to control the speed, torque, or another aspect of the motor. If ...
user avatar
  • 3,223
5 votes
Accepted

Connecting Motor wiring

Well it seems completely straightforward: tien li kou huo xien <--> xien xiu qi "L" t'ou tien li kou leng xien <--> xien xiu qi "N" t'ou tien tung ma t'a lan xien <--> xien xiu qi "...
user avatar
5 votes

5hp 230v single phase motor popping 30amp breaker

NEC Table 430.245 states to size 5HP motor for 28A at 230V. Add 25% for start up and the circuit should be sized for 35 amps minimum. That would be #8 copper conductors with a 40A or 45A breaker. ...
user avatar
5 votes

Why is my Panasonic Whisper series bath fan starting up so slowly?

To make these fans quieter, the fans are designed to not create as much turbulence, which means they "slip" more when the air is not moving already, i.e. when you first turn them on. In addition the ...
user avatar
  • 14.4k
5 votes

Why is my Panasonic Whisper series bath fan starting up so slowly?

Installation guide, page 10...."Attention: when the switch is at the "ON" position, wait 8-10 seconds for the Fan to start. This is a normal working condition."
user avatar
5 votes

How to quantify the difference in power of tablesaw motor rewired to 240 vs 120 volts

You'll need to check the motor manufacturer's specification sheet for your model to be sure but generally there should not be any significant performance difference between running in at 220V vs. 110V....
user avatar
  • 20.3k
5 votes

Old drills randomly starts slow and rattling (if at all)

JJM your understanding of how motor brushes work is lacking some practical experience. For less than 20$ you can probably have both running like new and gain the experience. Holding the motor at an ...
user avatar
  • 95.4k
5 votes

Cordless lawn mower briefly starts then cuts out

I checked the battery and it reports as fully charged and the multimeter says it is at 57.1 volts out of the supposed 58 volts, which seems fine to me Is that the voltage checked right after charging?...
user avatar
  • 1,785
5 votes
Accepted

Can I install a 240V outlet in my new US home for my UK kitchen appliances?

You should be able to do this, but there are a few things to consider: Any 240V receptacles should be in addition to the required 120V receptacles. In a kitchen you need at least 2 counter-top ...
user avatar
5 votes

Will Front Load Washing Machine (BLDC motor) rated for 220V 60Hz work in another country with 220V 50Hz?

Check the nameplate Every competent appliance has a placard or nameplate somewhere on it which states the power requirements. That is the last word on the subject.
user avatar
4 votes

Why are furnace/central AC blowers so inefficient?

Just because the furnace fan is rated at 3/4 or more horsepower, does not mean that it is actually running at that power level. To clarify this, consider the extreme with an electric motor with ...
user avatar
  • 12.1k
4 votes
Accepted

On the number and shape of my swamp cooler motor cord terminals

That looks like an Adobe P2-911 plug and it is proprietary. There's another version Adobe made (I believe it's for the 230v motors) that has a 5th round pin. The flat bladed terminal is for keying the ...
user avatar
  • 6,825

Only top scored, non community-wiki answers of a minimum length are eligible