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The most recent discussions

T-shaped US outlet?


October 6, 2017, 6:12 am

I have an old (1940s I think) ceramic outlet in a box, for a two prong plug, no ground. It accepts a standard US 2 prong (1-15) plug. It is polarized. It is also marked 15A 125V (molded in the ce... Read more »

Electric Motor for Animated Store Display


September 22, 2017, 6:14 pm

Hello, all, and perhaps a question for the seniors in the ng: Back in the 1950s-1960s era one often encountered countertop (or larger) cardboard product displays that were animated by a simple bac... Read more »

Medium Voltage Cable Market Trends, Business Strategies and Opportunities w...


September 22, 2017, 11:49 am

Request a Sample Report at http://www.theinsightpartners.com/sample/TIPTE10 0000470 Electricity conducting cables ranging from 2,000 V to 35,000 V is termed as medium voltage cables. These cables... Read more »

Explosion Proof Equipment Market Outlook to 2025 By .STAHL AG, Marechal Ele...


September 19, 2017, 12:12 pm

Request a Sample Report at http://www.theinsightpartners.com/sample/TIPTE10 0000620 Explosion Proof Equipment are used by different industry to prevent dangero us product that lead to explosion. E... Read more »

Low Cost Course in Electronics


September 6, 2017, 9:59 pm

https://www.udemy.com/electronics-for-complete-beginners Read more »

Best wishes and Good luck in your first year.


August 30, 2017, 7:29 pm

Crib notes or Cheat sheets. Trigonometry e^(iwt) = cos(wt) + isin(wt) i^2 = -1 and +i = squareroot(-1). -> 2(i)sin(wt) = [e^(iwt) - e^(-iwt)]. -> 2cos(wt) = [e^(iwt) + e^(-iwt)]. -> 2sinh(wt... Read more »

The rating of an EHV transmission line


August 18, 2017, 5:47 pm

When an EHV transmission line (let's say 345 kV or 400 kV, for example) is rated at 1,000 MW, is this 1,000 MW:- a. the rating which should not be exceeded in normal service, with the aim of elimi... Read more »

GFCI's: Upstream protection Also ?


August 12, 2017, 9:43 pm

Hello, Concerning the normal GFCI protectors/modules: Obviously they protect downstream like they are designed to. But does this protection also extend upstream ? If so, to where ? Thanks, Bob Read more »

Single phase ind. motor with external inductor


August 12, 2017, 6:46 pm

To the person who replied: Thank you. I finally found my way into your reference. However, the resistance split phase motor does not seem to explain the motor I have. In the book there is no ext... Read more »

Re: Boy Scouts electrocuted in deadly Texas boating accident


August 11, 2017, 10:43 am

Hello, and your story, while tragic, isn't anything new. There's a number of instances over the decades where a metallic conductor (antenna mast, etc) from a ground vehicle came into contact wit... Read more »

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The best rated discussions

What's topping this power pole?

rating: 5

http://imgur.com/a/W1Uhz Cellular? Or...? Read more »

Nana Electronics power module ID?

rating: 5

Nana Electronics Co., LTD power module in DC motor controller is in series with H-bridge thermistor and both are in series with AC mains and motor load. Label on module says MC-0005G. Any idea whe... Read more »

Fuse or fusible resistor?

rating: 5
  [ 2 ]

Used in the battery (-) lead of a handheld scope. Schematics unpublished. Physically similar to a 1/4 W resistor, color light green. Marked IE7A or 1E7A. Google returns slim results, none promisi... Read more »

Three Phase/Single Phase Voltage Fluctuations

rating: 5

Hi everyone. I hope this is the right group for this post of mine - hoping someone will have some insight to this one. Our house power supply is three phase (i.e. 230v/400v). Since I live in the sout... Read more »

The dangers of using too many volts and amps from a power adapter

rating: 5
  [ 2 ]

Hello, I recently received a motorized telescope that runs off of 8 AA batteries. A power adapter is available but I have yet to find one available and my local telescope stores. The power requiremen... Read more »

Why has Romex wire gotten so expensive?

rating: 5
  [ 2 3 ]

Romex wire used to be near $20 or so for a roll, and now its near $100. Why has the price jumped so high? 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 »

Direction of travel of an Arc across 2 distribution lines

rating: 5
  [ 2 3 ]

Can anyone explain to me why an arc between 2 conductors on a bare aluminium overhead line will always travel away from the source towards the load. Many thx, Daniel Read more »

Why use a ground when the nuetral can do the same thing?

rating: 5
  [ 2 ]

In a typical home breaker box the neutrals and grounds are on the same ground bar. So why if I install an outlet do I need to ground the box? Why couldnt I just take a jumper from the neutral and gro... Read more »

Genie plus edm machine

rating: 5

I have acquired a genie plus edm machine and also require schematic and or wiring diagram Victor Jee Read more »

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