What Happens if...

Jan 10, 2011
903
4
18
Abingdon, MD
www.harfordsound.com
...I touch the black wire?



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Evan
 
Re: What Happens if...

...I touch the black wire?



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Evan

Touching the black wire is not as bad as using your teeth as a wire stripper and finding out the circuit is live
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Had an old friend who did that, the AC didn't hurt him (much..), but just found out alcohol eventually killed him.

Back in school we had a guy who on every monday morning would lick his fingers and grab ahold of the 2nd anode of a TV set. Black and White-he didn't want to do color sets as they were about 10Kv higher.
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He was one of the most happy-easy going guys you would ever meet. I don't know if the morning shocks did it or not-but he claimed they helped.



To each his own.
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Re: What Happens if...

Do pro level wires come in a color other than black? Or are you talking about the connector? I guess then it would depend on what the other end is connected to.



The jackets on a three phase run will, if not black, generally be Black, Red, Blue, White, and Green. The cam connectors will have those colors though. Then opening up the jacket of any of your AC cables, chances are you'll see Black, White, and Green.
 
Re: What Happens if...

Long ago in my padawan days I got shocked by touching the white wire.



I was troubleshooting a problem in my house (wire slipped out of a wire nut), and some device was plugged into the circuit in question. The loose wire was on the return path (white), so I assumed I was OK to work on the circuit live (stupid ASSumption), and when I was sticking the wire back in the nut, I completed the circuit with my fingers.



That was the last time I assumed anything about electricity.



I now carry a non-contact tester, VOM, and occasionally 1K par can to any questionable electrical situation.
 
Re: What Happens if...

Back when i worked in construction, i knew an electrician who had tested for hot for over 40 years by licking a finger and tapping.



Until one day, it caught his heartbeak in exactly the wrong place and stopped it.
 
Re: What Happens if...

Long ago in my padawan days I got shocked by touching the white wire.



I was troubleshooting a problem in my house (wire slipped out of a wire nut), and some device was plugged into the circuit in question. The loose wire was on the return path (white), so I assumed I was OK to work on the circuit live (stupid ASSumption), and when I was sticking the wire back in the nut, I completed the circuit with my fingers.



That was the last time I assumed anything about electricity.



I remember chatting to an electrician who was wiring in tails for me at an event. He had suffered a shock in similar circumstances. He had isolated the live on a single phase installation, and got a 240v belt from the neutral. It turned out that the local electricity board had inadvertently reversed the meter tails. Moral of the story - always meter anything you are going to be touching.



I now carry a non-contact tester, VOM, and occasionally 1K par can to any questionable electrical situation.



The 1kW par definitely has its uses. I've occasionally come across cables which seem OK with a plug-in tester but won't power a par, typically because a connection is corroded or hanging by a thread.
 
Re: What Happens if...

Care to shed some light on this? Ya know since its a new forum and It won't show up in a search...
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Quick Search of ''Cam Lock'' shows 208/240 Volt as Green, White, Black, Blue, and Red (which i knew about these colors and voltages). It also shows 480 Volt as Green, Orange, Yellow, Brown which I was unaware of (never used before).



Now back to 208/240 Delta Vs. Wye... Why? Why the difference? Benefits?



Another quick search of ''Delta Wye Transformer'' yields the answer I think;



Quote: said:
A delta-wye (Δ-Y) transformer is a transformer that converts three-phase electric power without a neutral wire into 3-phase power with a neutral wire. It can be a single three-phase transformer, or built from three independent single-phase units. The term Delta-Wye transformer is used in North America, and Delta-Star system in Europe.



Delta Wye Transformer

Delta-wye transformers are common in commercial, industrial, and high-density residential locations, to supply three three-phase distribution systems.

An example would be a distribution transformer with a delta primary, running on three 11kV phases with no neutral or earth required, and a star (or wye) secondary providing a 3-phase supply at 400 V, with the domestic voltage of 230 available between each phase and an earthed neutral point.



I don't know why I never found that before but I think I answered both my questions and understand, Wye supplies a ground and neutral while Delta does not.