⏚ Electrical Engineering - Main Page

⏚ Electrical Engineering Electrical Engineering discussions. This forums is a Web, Mobile and Social Media interface to alt.engineering.electrical.
There are 62193 articles in 6668 discussions. See the most recent and the best rated articles in ⏚ Electrical Engineering

The most recent discussions

Electric Grill (Smoker) thermostat IR drop?

August 29, 2019, 6:54 pm

The thermostat that plugs into my smoker has blue corrosion on the hot side of the wiring. The manufacturer insists that this is from using an extension cord. Why would that cause the thermostat/cont... Read more »

Re: Washington man claims "I hate America" beaner Ariana Grande t...

August 27, 2019, 4:04 pm

And conservatives think nut cases like this have a right to carry AR 15's into a Walmart. Read more »

UK power outage: Live updates

August 10, 2019, 1:21 pm

UK power outage: Live updates Full story: 6:24 Goodnight This is the end of live updates on the power cut across large areas of England and Wales, which affected nearly one million people. Ho... Read more »

Wind, solar, storage and back-up system designer. Free online calculator to...

July 10, 2019, 9:58 am

There are two links, the first to the designer free online calculator tool itself and the second link is to my blog post about the designer. Wind, solar, storage and back-up system designer for 10... Read more »

Not exactly electrical

July 6, 2019, 2:20 am

What do you guys know about OTA TV signals. How much are the affected by trees? Long story short I have a 70 mile deep fringe reflector antenna 30 feet up, aimed right at a tower 30 miles away, f... Read more »

Rulew of thumb DC vs AC coils

June 5, 2019, 7:06 am

Say you have a relay coil rated at 24VAC, is there a rule of thumb what the DC current might be to operate it? I do understand the residual magnetism thing. Read more »

2020 National Electrical Code Updates

May 22, 2019, 2:46 am

Just In Case-Good Secure Link >>>==> https://www.nfpa.org/News-and-Research/Publications-and-media/NFPA-Journal/2019/May-June-2019/Features/2020-NEC-Changes Read more »

National Electrical Code 2020 Updates

May 22, 2019, 2:42 am

https://www.nfpa.org/News-and-Research/Publications-and-media/NFPA-Journal/2019/May-June-2019/Features/2020-NEC-Changes Read more »

It's Never Too Late To Make Things Right

May 16, 2019, 4:51 am

content://media/external/file/41166 Take Your Time, Do It Right. And Yeah Put A Little Class & Finess Into It, Or Have Someone Do The Terminations For You ASAP. ( No more nasty poorly finished job... Read more »

Measuring PWM current?

April 29, 2019, 3:24 am

Can an RMS current clamp meter accurately measure the current of a PWM voltage? How else to measure PWM current without a shunt or direct in-line meter? Thanks. Read more »

Click here for other recent discussions »

The best rated discussions

C122D1 pinout?

rating: 5

Moto SCR C122D1?s datasheet lacks pinout: http://www.alldatasheet.com/datasheet-pdf/pdf/92631/MOTOROLA/C122D1.html This is the only datasheet out there that I can find. Anyone have a databook for ... Read more »

smps controller IC datasheet?

rating: 5

oem power supply, 31.5 vdc 1.5 A. I want to change the output to 24 v. There is one 8-pin IC, labeled: 230D1 PUICO I don't see a datasheet anywhere for this. Any ideas? Thanks, Dave Read more »

Strain Gauge Oscilloscope Help

rating: 5

I am using Vishay 120 ohm Strain Gauges, (specifically EA-06-062AP-120) to try and generalize certain readings taken from aircraft engines. We have set up a small device to vibrate to simulate an eng... Read more »

Lightning protection and residential landscape lighting

rating: 5

Hi, My house is on a hill which is rocky. After getting hit at least twice in the past two years by lightning, I installed a lighting protection system. On each occasion I was lucky in that the only ... Read more »

Excessive brush wear on DC motor.

rating: 5

Greetings! We have a field excitation DC motor on our SAMP machine. We are experiencing 1 brush on the DC motor to be wearing out a lot faster than the other 3. (My understanding is that the brush t... Read more »

Racking out of motor starter?? How?

rating: 5

I need to take the overcurrents off a motor starter in an MCC. The problem I have is that the motor starter is racked into a live 600 Volt bus. I want to know if I can rack out the motor starter with... Read more »


rating: 5

Hi: Has anyone heard about what ever became of ETCON's AFCI Tester (or more recently: ETCON AF120 ARC-FAULT TRIPPER AND RECEPTACLE TESTER)? Mike Holt's blog. As follows... Underwriters Laboratorie... Read more »

280V motor on 230V circuit

rating: 5
  [ 2 3 4 5 6 7 8 ]

I have a broken pool motor [magnetek y56y] which will cost a bundle to fix or repair. While doing a search on the web, I found the same model (really cheap) but wired for 280V, instead of the 230 V l... Read more »

Linear current booster

rating: 5

Wondering where I might find a schematic for a home brew linear current booster to control PV module power to a very small 12V 2.5A bilge pump? My googling didn't turn up anything. Chuck Read more »

Ampere turn diagram

rating: 5

Hello Guys I've been looking at some old engineering documents that relate to the calculation of transformer reactance, it goes on to explain the use of ampere turn diagrams as an aid to reactance ca... Read more »

Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here. All logos and trade names are the property of their respective owners.