The 1,500V DC figure is the one that counts
IEC 60900 gives two ratings: 1,000V AC and 1,500V DC. Tool makers print the AC figure because the standard was written for mains electricians and that is what their market reads. A traction battery is a DC source. The limit that applies to a tool in an EV bay is 1,500V DC, which leaves an 800V pack with margin to spare.
Behind the rating is the routine test. Every tool to the standard, not a sample from the batch, is tested at 10,000V. That margin between the test voltage and the working rating is what makes a 1,000V tool credible, and the same margin covers 800V.
Gloves work the same way. A Class 0 glove to EN 60903 is 1,000V AC and 1,500V DC. Buy tools and gloves to the same class and nothing in the bay is rated below the car.
The 800V cars a UK garage sees
Porsche Taycan and Audi e-tron GT run 800V systems. So do Hyundai Ioniq 5 and Ioniq 6, Kia EV6 and EV9 and Genesis GV60. The Hyundai and Kia cars are mainstream family cars sold in volume, which is why an independent that has only seen 400V platforms so far will see an 800V one soon.
More are coming, because a higher voltage moves the same power at lower current, which means thinner cables and faster charging. Pack voltages are going up, and 1,500V DC is still clear of them.
An 800V car is no more dangerous to work on than a 400V car. Both are lethal. What changes is that anything rated 750V DC, which is what a Class 00 glove gives you, is now below the pack voltage on paper, so the Class 00 habit has to stop.
The marking, and what VDE GS adds
Look for the double triangle and 1000V moulded or printed into the insulation of the tool itself. The double triangle means suitable for live working. The voltage is the AC working rating and, on a tool to IEC 60900, brings the 1,500V DC rating with it. The standard number is usually there as well, sometimes with the edition year.
Any manufacturer can print IEC 60900 on a handle. VDE is a German testing body that tests the tool itself against the standard and licenses its GS mark (geprüfte Sicherheit, tested safety) to tools that pass. A VDE GS mark means someone outside the company tested it. A standard number alone means the company says it complies. Both can be true of a good tool. Only one of them can be checked from the bench.
What a plastic handle tells you is nothing. A comfort grip on a standard socket is there for grip. It has not been tested, it has no rating and it conducts under fault. The two look alike in a drawer. The marking is the only difference you can see, and the 10,000V test is the difference you cannot.
When a kit beats buying piecemeal
Insulated hand tools arrive by two routes: an EV or hybrid branded kit from a tool brand, or electrician's VDE sets from the brands that have made them for decades. A 25 piece 3/8 inch drive EV kit sells for about £230 inc VAT at the sheds. A 27 to 29 piece 1,000V socket set runs £205 to £330 ex VAT depending on brand. Electrician's VDE sets go from £44 for screwdrivers to over £1,000 for a full case.
A kit wins when you are starting from nothing, because it comes in a case or roll that keeps the insulated tools away from the uninsulated ones, and because the sizes have been chosen for disconnects, pack fixings and busbar fasteners. Piecemeal wins when you already have half a case and need the sizes your platforms use, or when one tool has been retired and needs replacing.
Avoid the mixed roll: an insulated 13mm living next to a standard 13mm. Sooner or later the wrong one gets picked up near a live terminal. Whatever you buy, give it a home nothing else lives in.
Budget for an insulated torque wrench. Busbar and terminal fixings are torque critical, and without one you are choosing between correct torque and insulation.
When to retire a tool
There is no expiry date on an insulated tool. It lasts until it is damaged, and the damage is ordinary: a nick from a drop onto concrete, a split from being used as a lever, a soft or discoloured patch from heat or solvent, or the outer colour worn through to the inner layer.
Any of those and the tool is finished. Insulation cannot be repaired in a workshop, and tape over a nick hides the damage from the next inspection. Inspect before every use, as you do with gloves, and make binning a tool a normal act nobody has to justify.
Drops are the one people argue about, because the tool often looks fine from arm's length. Check the point of impact under good light and flex the insulation there. If there is a mark, a crack or a soft spot, it is done. If you cannot tell, it is done.
Keep the retired tool out of the workshop entirely. An insulated socket with a nick in it still works as a socket, and that is how it ends up back on the bench.