Best Rated threads in ⏚ Electrical Engineeringshow all threads
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Why is EE education mainly glorified math?
Of course EE is not about solving glorified math problems. But the EE educational system is set up in such a manner. Most of an EE student's GPA consists of the ability to solve problems on paper for...
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20 years ago
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50 | |
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Question: Should a light bulb ever flash when the switch is turned off?
Hi, just a quickie until I can contact my local electrician in the morning. Apologies in advance for my limited understanding of things electrical! A little earlier on I fitted a Philips energy saving...
13
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20 years ago
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13 | |
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supply for old audio transistors (driver transistors: 2SD381 / 2SB536)
Hi, I find it pretty hard to find a shop that actually understands what one is asking for... I my case most of the shops I called up they did not even know the amplification class of their transistors...
22
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20 years ago
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22 | |
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Electric Motor Wiring
Hi I have an old Shopsmith Mk VII that all of a sudden wouldn't turn on. I tried replacing the capacitor (didn't help). I think it might be in the switch but no hope of replacing that. One piece so...
7
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20 years ago
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7 | |
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Why use a ground when the nuetral can do the same thing?
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...
22
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20 years ago
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22 | |
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Why is the neutral isolated in a sub box.
If I have a 200 amp main in my house and later on decide to put a 100 amp subbox in my garage.....why do I have to isolate the neutral from the ground in the garage box? I am asking this because in...
29
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20 years ago
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29 | |
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Re: PIONEER PD-T505 schematic
Contact Pioneer Spare Parts and order the service manual. al.
4
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20 years ago
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Help/air compressor tripping 20 amp breaker
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 breaker...
11
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20 years ago
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11 | |
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conduit fill - romex?
We're working on a kitchen renovation in a house built about 1900. The kitchen space has been gutted down to the studs and overhead joists and is nice and easy to wire with romex. There are sufficient...
9
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17 years ago
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9 | |
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200V vs. 208V grids, 3 phase
I understand that some metro areas have 208 V networks and others have 200 V networks. Further, I heard that NYC has multiple grids, some 200 V some 208 V. Motors rated (and nameplated) for 200 208...
3
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17 years ago
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3 | |
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Honda eu2000 generator output waveform
Hello all, I hooked up an o-scope to my Honda EU2000 generator and discovered something interesting about the waveform. Initially the waveform looked like a regular 60 HZ sine wave. When I changed the...
16
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20 years ago
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16 | |
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T-slot plugs and 20 amp appliances?
All this discussion of 240-volt appliances has me wondering about the fairly recent US and Canadian electrical code changes that encourage us to install the t-slot 20 Amp receptacles in places like...
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15 years ago
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38 | |
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Strain Gauge Oscilloscope Help
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...
5
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18 years ago
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5 | |
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Help with circuit diagram please
Hi I have a slightly unusual project I wonder if someone can help with. I need to customise a guitar to include 20 4.8v 3A torch batteries. They will be powered by 2 4.5V Alkaline batteries, the...
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19 years ago
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15 | |
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Identifying Transformer Core Overheating Problem
I need assistance with identifying the cause of a transformer core overheating problem. I am not an electrical engineer but I have 20 years of experience in transformer repair. The unit in question is...
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18 years ago
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Why has Romex wire gotten so expensive?
Romex wire used to be near $20 or so for a roll, and now its near $100. Why has the price jumped so high?
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17 years ago
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40 | |
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Will 120v/60Hz microwave ovens run at 120v/50Hz?
Question for the experts :-) Will 120v/60Hz microwave ovens run at 120v/50Hz? If not, why not? TIA rf
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18 years ago
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Questions about a Motor Starting Capacitor
My garage door opener stopped working; it just hummed for about 2 seconds. For no particular reason I touched the starting capacitor and fixed it. It ran okay for a couple days, then stopped. I...
2
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19 years ago
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NEC on soldering wiring
Dumb question: Does the NEC specifically allow, forbid or is silent on the subject of soldering home electrical wiring (type NM solid copper) together before using wire nuts?
26
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17 years ago
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26 | |
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Open delta transformer - Z calculation
I'm after some advice regarding a transformer impedance calculation I need to produce for a design in the near future; basically the transformer will be 75kVA with a 400V open-delta primary and single...
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15 years ago
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