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Borisgiles  
#1 Posted : 25 January 2012 15:32:52(UTC)
Rank: Forum user
Borisgiles

I've been asked to write a SSoW for the following:


Background first
CRT TV's are taken to a household waste site, they are then loaded in to wire cages stacked up to 6 deep with no protective packaging. They may well be left in the rain for a while until the load builds up. They are transported on a lorry and unloaded with a FLT.


Where we come in with new (to us) procedure:
We pick out the TV's and select those which look to be intact. We leave them to dry for 12 hours then PAT test them and plug them in to see if they work. This is done on a RCD protected circuit.

We usually destroy and recycle the TV's and do not attempt to re-use but we only need a couple of hundred for an exhibition (yes, we have all the appropriate waste licences etc)

Now, by my understanding of PAT testing this would just be a visual inspection for damage as earth leakage is unlikely to show up any issues due to them being double insulated. I don't believe an RCD will necessarily prevent any risk to the person plugging it in and switching it on although this is not my field of expertise.


So I don't want to touch this procedure with a bargepole, but am I being paranoid? The manager who wants to do this says he used to have a PAT testers certificate and there is no problem.


Thoughts please?
paul.skyrme  
#2 Posted : 25 January 2012 19:42:51(UTC)
Rank: Super forum user
paul.skyrme

More questions I'm afraid, no answers yet!

What PAT machine to you have?

What training and experience do those using it have?

Do you feel 12 hours is sufficient to dry them?

What hazards do you feel are present?

Whom are you protecting from these hazards?

What is the test environment?

Do you have current valid satisfactory test & inspection reports for the fixed installation which you are using to test these units?

Frank E  
#3 Posted : 25 January 2012 21:41:51(UTC)
Rank: Forum user
Frank E

Your [insulated] bargepole idea sounds the safest.

Scrap televisions for an exhibition?

I could recommend a display hire firm that rents out displays for arena tours, exhibitions, NMCs.
paul.skyrme  
#4 Posted : 25 January 2012 21:46:43(UTC)
Rank: Super forum user
paul.skyrme

I'll not explain too much but I do "have" an insulated (barge) pole 1.5 to 5.6m extendable!!! ;)
Ron Hunter  
#5 Posted : 25 January 2012 22:55:52(UTC)
Rank: Super forum user
Ron Hunter

The law of averages suggests that sooner or later, one of these duds will have a live casing, likely to kill the person attempting to connnect to the RF socket (And your PAT tester probably won't get past the power supply unit).
I wouldn't touch this with Paul's bargepole. TVs are dangerous and can store very high energy, giving the unwary a nasty jolt under fault conditions, even when switched off. Ponder that and tremble when you're up that ladder hooking up TV number 93!
The daisy chain arrangements for this 100 tv "exhibition" might prove interesting though!

If your Manager thinks this is all a great idea, I suggest you let him crack on.
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