If you read my post you will see that I specifically specified a dual-output coil, which is isolated, not a single-output coil, which is not.a normal car coil has a link from LV to HV
True, but that doesn't happen when the circuit is operating.if the ckt is left to charge longer it can reach 200V
And just to further clarify, the dual-output coil has to have at least 20kV isolation between the primary and secondary, which, I think, should be sufficient for mains' isolation.Just to be clear, a dual output lost spark type coil - has no mains isolation rating what-so-ever.
And if the hot side of the mains are accidentally connected to the ground of the circuit, which is connected to the HV ground for a standard coil, you will certainly blow a fuse or open a breaker.And for the driving circuit it makes no difference at all. It does never see the HV side.
Certainly it's not difficult to simply generate a strong shock at the coil output with no load.Regular electric fences are nohow that complex.
I know for a fact that a car coil, a resistor, a relay and 4 NiCd
AA cells will knock you out. Unexpectedly. With no ground loop
to blame.
I agree on this statement.Standard practice is to always isolate mains' voltage from any output.
Do you not think that's necessary?
The problem is, in the manufacturing, the required isolation is not guaranteed as it would be for a mains rated partAnd just to further clarify, the dual-output coil has to have at least 20kV isolation between the primary and secondary, which, I think, should be sufficient for mains' isolation.
Really ? if the live mains ( say 230Vac ) is connected to the output wire via a fault, or faults, you would be happy to touch it ?in my eyes the isolation between primary and secondary has no safety effect on an electric fence, since the HV side is connected to GND and the fence. So it´s the job to give an electric shock.
I though we were talking about a home-built device, not something to be manufactured.The problem is, in the manufacturing, the required isolation is not guaranteed
OK. you are free to do so. You may discuss many many applications. And you may talk about selling and the whole world.p.s. there are many, many mains powered electric fences sold around the world - and applicable UL and other standards for them
Because in post #11 the OP asked me to post my line-powered design, that's why..But the OP never talked about "mains powered". Never talked about AC at all. He talked about battery.
So why bringing "mains" into the discussion?
Please read all the posts before dinging me.
No, the lines powered part of my circuit is not connected to earth ground.But then I see that your SCRR is connected to EARTH_GND and your transformer_output is connected to the same EART_GND.
This would never pass a safety regulations.
No it won't.your circuit will fail this test
Then I suggest you read the whole thread before posting criticisms.Before posting I searched for "mains" and for "AC" ... could not be found.
absolutely - until some else touches it after it has faulted . . .I though we were talking about a home-built device, not something to be manufactured.
So you think a coil that can withstand at least 20kV between primary and secondary, is more likely to fail than a UL transformer certified for 2.5kV?absolutely - until some else touches it after it has faulted . . .
Okay, I'll ask myself, since I qualify as "any motorcyclist".and they often do fail - ask any motorcyclist
Only if the neutral and hot are wired incorrectly.if one side of the HV is earthed - there is a steady 230Vac ( max case ) across the insulation all the time, 24/365 .
And you think an "approved" transformer will not fail from a lightening strike?and then there are mains transients, and possible lightning strikes on the " live " wire - the motorcycle coil will not fare too well then
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