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The most recent discussions

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 »

Another MV Distribution


April 26, 2019, 5:11 pm

Hello, all, and I may have posted this question once before, which has to do with procedure rather than a theoretical understanding: On overhead MV distribution systems one often observes a bank... Read more »

Re: How do you recycle solar panels?


April 13, 2019, 4:25 pm

On Sat, 13 Apr 2019 23:42:59 +0800, Mr. Man-wai Chang It is hard to recycle anything without pollution. If you have to ship it a 1000 miles or more to get to the recycling plant, you have polluted... Read more »

MV Distribution w/Floating Neutral?


March 20, 2019, 2:36 pm

Hello, all. I was in Cedar Rapids, IA recently (I don't reside there) traveling along Rt. 100 (Collins Rd) in northeast of downtown. I noticed utility poles with a single cross arm accommodatin... Read more »

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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 »

12470 to 208 transformer

rating: 5

I can't seem to find a transformer for 12470 pri to 208 sec. Any suggestions? Vendors? I've heard people talk about parallel transformers. If the turn ratios are the same and impedances are the same ... 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 »

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 »

Another hot tub wiring question (long) - best 3-phase service?

rating: 5
  [ 2 ]

This rather long question is directed to electricians and engineers who are familiar with wiring and service installation requirements for a commercial hot tub business. The question is what is the ... Read more »

Re: PIONEER PD-T505 schematic

rating: 5

Contact Pioneer Spare Parts and order the service manual. al. 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 »

Help/air compressor tripping 20 amp breaker

rating: 5

I have a 58' run of 12/3 wire running to the shed that operated some lights and a small 110v sears 30 gallon air compressor nearly new. The first time or two of turning it on to build air the breake... Read more »

quadrant-eleventh-gram-second system

rating: 5

What is the quadrant-eleventh-gram-second system of units? What is the significance of quadrant ? What is the significance of eleventh ? What is good reference? Bill -- An old man would be better of... Read more »

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