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Right. Welcome to this tutorial, 

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electric vehicles in this session,
 we're going to cover the tools required

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when you're working
 on the high voltage systems

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of an electric vehicle,
 purely simply for safety sake.

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You know, the high voltage systems
 and electric vehicle are really dangerous.

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So we have to use special insulated tools
 and special equipment

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to work on these systems
 to protect ourselves and other people.

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While we're working. 

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The first thing we have
 are our safety gloves,

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these come in a sealed packet.

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Look like a very dandy pair of marigolds.

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But thy're not. They are designed
 to insulate your hands

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from the high voltages
 on the electrical system.

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These have to be checked
 every time you use them.

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We have a special tool here
 that we can use to test them

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and basically just put the glove over it. 

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So and then we pump it up.

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And the idea is it stays up
 and it doesn't go flat

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the other way we use them,
 which is what most people do.

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Instead of using this is you basically
 just get the glove.

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Spin it round and squeeze it, and you're
 just looking to make sure there's no

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pinhole because last thing you want
 is a pinhole and a rip in it

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when you've got it on your hands. 

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The next thing we have is our safety hook.

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This is here in case
 we do get something wrong,

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because last thing you want to do is if
 somebody is connected to the high voltage

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system is to grab hold of them
 because it's then going to electrify you.

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So we have a hook used to hook around
 the person to pull them off.

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We then have our selection of tools.

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All these are insulared to 1000 volts.

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Most batteries on EVs pure electric
 vehicles are around the 400 volts mark.

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They do get up to as high as 800 volts,
 so we need adequate insulation.

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On a hybrid we're talking less
 into probably 200 volts,

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but still enough
 to do some serious damage or kill you.

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The idea is everything
 is plastic insulated.

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So even though the actual sockets,

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are metal and the bits are metal,
 once the tool is assembled,

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there are absolutely no metal parts
 accessible to the person using the tool.

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Yet you should still use your gloves. 

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But, even if you're not,
 you're still insulated.

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Same with plyers and cutters.

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As you can see, these have got nice, 

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thick, chunky handles
 on, so they're insulated to 1000 volts.

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Again, same thing. 

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They've got the ridges
 here. Stop your hands going forward.

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So you can't actually accidentally

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touch the metal parts
 of the tools. Screwdrivers.

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The only bit that's actually bare
 metal is the very tip.

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The rest of it is all insulated, designed
 to keep your thousand volts away.

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These must be kept clean. 

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The last thing you want
 is oil and grease on these,

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because then that just completely negates
 any insulation that you've got there.

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We also have spanners.

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These look more like something that come
 out of your kids toolkit, but they're not.

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They are a steel spanner inside
 with nice, thick, chunky insulation on.

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We do go down to little baby ones,
 which really do look like something

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that come out of your kid's tool kit,
 and then we go to

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decent sized ones as well. 

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So we have a full range
 of spanners. We have

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this is something
 hopefully we never have to use.

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This is a safety knife for cutting cables
 just in case something goes wrong

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and you need to cut through the cable
 in an emergency.

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But really, we don't want

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to be having to use that. 

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And then we come on to 

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the multi meter. 

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This is an essential part of your toolkit.

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This tells you all your voltages,
 current, etc, that's involved

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in doing the testing
 of the electrical circuit.

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This will tell you
 when you circuits live or dead,

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so it tells you whether the circuit
 is safe to work on.

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So we've got turn on a nice big display,

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so it's nice and easy to read and

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it's auto arranged. So
 you don't have to do anything else to it.

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You just literally turn it on
 and it sets itself.

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These are what we call
 Category three probes.

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So these are rated to 1000 volts as well.

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They have extra tips on covers on the ends
 to cover the probe.

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Once you take these covers off,
 they are no longer category three rated

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because of the amount of metal
 that's visible at the end, the end

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you must keep the tips on. 

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So you've only got the tiniest
 bit of metal at the end that's visible.

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Always check the leads
 before you use them.

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Make sure there's no damage,
 no splits in the insulation,

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no damage to the actual probes,
 anything like that. Don't use it.

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The last thing you want
 is to be poking into 600 volts of electric

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and find out the bit of wire
 touching your hand

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hasn't got any insulation
 on it, and it's now just

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electrocuted you. 

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These have to be tested on a regular basis
 as well to make sure everything's OK.

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I think it's every twelve months. 

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They've got to be inspected
 and tested. Gloves

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come in a sealed packet,
 once opened six months.

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You can't use these after six months.

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Once they're opened. 

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They're good for
 I think it's three years in the package,

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but it's six months, once it's opened. 

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Once you've opened them, they have to be
 thrown away after six months.

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In general, you know, 

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these are your basic tools for working on

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the high voltage side of a HV car, either
 electric or hybrid.

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Doesn't matter which
 both are equally as dangerous.

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It is safe to work on the system using
 ordinary tools, provided you've made sure

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that it is fully discharged
 and you check it, to make sure.

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My advice would be
 if you're working on any part

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of the high voltage system,
 whether it's disabled or not.

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Make sure you use the insulated
 tools better safe than sorry.