Can a multifunction tester kill you?

[DNS1]

A quick zap with the 500v IR tester isn't too bad, but what happens if you get yourself with the RCD test?

150mA is more than enough to kill you, should I be worried about accidentally RCD testing myself?!

 

[Dcf]

I was at a party at my mates house years back.one boy had fallen asleep on the couch and he had the bright idea to break out his shiny new metrohm insulation tester.one croc on the boys earring ,one on his wedding ring.250v he gave a shrug 500v he twitched a wee bit more.gave the tester to my man mountain of a mate in case the lad somehow came to.man mountain turned it up to a 1000v and presses the button like a Nintendo control.lad on couch starts moving like Frankenstein,white stuff comes out his mouth and finally he is sick everywhere.....oh dear.couch boy falls back asleep none the wiser what happened apart from he looks like he had been in a cage fight with all his bruising.manslaughter trial avoided.if your gona zap yourself with a tester make sure you drink a litre of vodka first.......

 

[trev]

Apparently Ir tests on apprentices are now frowned upon.
Shame

 

[ultinator]

Someone told me that soaking neon screwdrivers in water to bypass the resistor then wiping it dry and handing back to anyone silly enough to use it isn't acceptable either.

 

[Des 56]

Apparently Ir tests on apprentices are now frowned upon.
Shame

When I was in in college so many moons ago, it was obligatory

You had the choice of being the crocodile clipper on the ears operative or the Meggar winding person

It had to be a well co'ordinated action,the crocodiles and the generated hello had to be simultaneous for the maximum effect.it taught us teamwork and respect for the safe use of instruments:crazy:

 

[DurhamSparky]

i used to wake my fellow crew members up with a 500-1k dc current!! lazy bar stewards!

 

[ackbarthestar]

I once heard of a tutor demonstrating the shock potential of a wind-up megger by getting all of his students to hold hands, placing a copper rod in the hand of the student at each end and then connecting the croc. clips to copper rods.
Wound the megger and asked whether or not the students could feel anything. When they said no he explained the principle of resistors in series. He then said to the students, 'all those who have handed in their homework please leave the line' and told the others to join hands, then repeated the test. The answer to the repeat question was, 'a little Sir'.
Then he said those students still in the line up, 'those who spend their time chattering in my class and being disruptive stay in the line and the rest go and sit down'. The test is then repeated and the question asked again. At some point the student/s get the point.

This method of education is, I believe, not allowed in FE colleges

 

[Knobhead]

What is the average IR reading for an apprentice? Was always to bussy watching the lad to make a note of it.

 

[ackbarthestar]

They are often full of resistance its just getting the potential right or high enough to overcome the resistance!

 

[MarkieSparkie]

If your test method or equipment was inappropriate for the circumstance, or through negligence, you were to cause a spark or short-circuit which initiates an arc-flash the consequence could be debilitating injuries or extremely painful death. Typical injuries are severe burns, ignition of clothing, lung tissue damage, deafness, blindness, fractured and broken bones; which can result in treatments requiring years of surgery and rehabilitation, but may still result in a lingering death.

Arc flash is a short circuit through air that flashes over from one exposed live conductor to another conductor or to earth. Most low voltage (<1000V) systems are more than capable of supplying sufficient energy to create an arc-flash with the force of a severe explosion equivalent to hundreds of grams of TNT, creating vast temperatures (typically 20,000 °C) at the arc terminals.

The massive energy released in the fault rapidly vaporizes the metal conductors involved, blasting molten metal and expanding plasma outward with extreme force. The result of the violent event can cause destruction of equipment involved, fire, and injury not only to the worker but also to nearby people. In addition to the explosive blast of such a fault, destruction also arises from the intense radiant heat produced by the arc. The metal plasma arc produces tremendous amounts of light energy from far infrared to ultraviolet. Surfaces of nearby people and objects absorb this energy and are instantly heated to vaporizing temperatures. The effects of this can be seen on adjacent walls and equipment; they are often vaporised, chipped and eroded by the radiant effects.

In the past, if someone suffered burns in an electrical accident, people thought the burns were caused by the electrical shock passing through the body. Electrical shocks can cause burns. However, research has shown that most burns from electrical accidents actually come from arc flash.

 

[RogertheBodger]

Two panel pins punched through the back of a wooden toilet seat, couldn't feel them when sat on, buy they made contact all right. wiring attached and cleverly concealed, megger attached - you can guess the rest!

The screams were satisfactory. Never hung around long enough to discover if our help enhanced or inhibited their ablutions, but they all came out, eventually, so it wasn't lethal, Apprentice's revenge - sweet.

 

[Thomas123]

What is the average IR reading for an apprentice? Was always to bussy watching the lad to make a note of it.

Roughly 100,000 ohms lol

 

[trev]

My mentor did an IR on me "So I would know what a shock felt like and so would take extra care to avoid a real one" sadistic b......

 

[micknew]

That would be the reading for a dehydrated apprentice.

 

[ackbarthestar]

You've seen the video as well ? Severe pain by death.... Prove dead; stay alive as someone once said .

Its not unknown for people to install new circuits into cabinets where open basbars are still left in a live condition. That's a risk assessment approach, I suppose. Not one that I would willing take on. Drop a spanner onto those basbars and its goodnight.

 

[Jimmy Boy]

Holy crap !

Electrician goes up in flames-accident.mp4 - YouTube