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Jim90

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As the subject suggests JCC threw in a curveball in a 5ft LED light that completely stumped my apprentice.

The back story goes like this.
We are on a small commercial job, cushy number installing 40 LED IP rated emergency and non emergency fittings.
I gave the task of telling my third year apprentice to crack on with the lift control room which had four lights fed by clix. Nice and easy. That's what I thought anyway.

0800- showed him what to do
1300 - at lunch and took the p*ss about why he hasn't done those lights yet.
1500 - comes up to me and says he can't do this anymore as he has a fault and 'checked everything' took the p*ss again.

He says to me the light keeps blowing a BS88 type fuse. To which I needed to hit the M25 before it gets stupidly busy and help him out. He is more than capable though!
So after using all the spare BS88 10A fuses he was going to 'try a 20A' to which I laughed at and said he's absolutely mad.
The light was fine before he put his up I kept saying so it has to be something to do with that. Asked him to pack up and I'll take a look. Saw the fault in a minute or so (attached) Took the p*ss again. And told him to put brown sleeving on the perm.
Took the p*ss out of him the whole way home.
That was a 3rd year!! He is actually a good lad! God knows what they teach him at college.

JCC tricked my apprentice! ima - EletriciansForums.net
 
Right hand side.
Sorry the picture isn't the best nor my description
He obviously connected as per the instruction on the fitting. Not knowing that the earth terminal is screwed to the metal base
 
So if he wires to the label or the internal wiring, it's going to short.
What's that between the terminals on the connector labelled as switched live?
 
I don't understand the wiring on both sides look like the final connection and not the fittings wiring.
 
A bit tired here, so sorry if I've missed it, but isn't the brown in the earth connector, the 3rd one down on their diagram?
 
Is the one marked as earth actually the earth as it doesn't appear to connect to earth but the terminal the cpc is connected to does?
 
Is the one marked as earth actually the earth as it doesn't appear to connect to earth but the terminal the cpc is connected to does?
It looks like it earths the fitting with a screw through the connector block onto the metal plate in the fitting?
 
It looks like it earths the fitting with a screw through the connector block onto the metal plate in the fitting?
Looks like L into 3rd terminal makes fitting live but something else provided a path to ground before anyone touched it.
 
That's just made my morning!!
Some problems, however rudimentary, need a new set of eyes, and it's part of the learning process for your 3rd yr apprentice to be able to get out of their own way and see just where they're being a dumbass. You'll be able to remind them of this for years....
 
So you nor the training center have taught your apprentice the most basic of testing before powering up a circuit?
 

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