The initial ESI26-3 specification stated that all insulated tools must be able to pass an electrical test of 10.000 Volts for 3 minutes whilst submerged in water.
The material must be able to function at temperatures from -20°C to +70°C, the material must also have to withstand impact, be flame retardant, have a good adhesion to the tool and also have the minimum moisture retention.
This specification has now been superseded by the International IEC 60900, of which IEC 60900:2004 is the current version. Basically this specification is identical to the ESI 26-3.
Althought PVC will meet the requirements of these tests, Nylon11 meets more than the above requirements, plus it is a much harder wearing material and will withstand the rigours of being out in the field longer. This not only makes the tools more cost effective, but also gives the operator the essential protection for longer.
Now that the specification for Live Line Working Tools has been adopted worldwide, an additional category has been included to take into account workers who have to operate in sub-zero temperatures. In general, tools have to be able to withstand impact at a temperature of -20°C, as previously stated, but in certain countries this temperature can be reached on a regular basis, therefore tests at -20°C do not offer adequate safety margins.
Now you can obtain tools which have been subjected to impact at temperatures down to -40°C and these can carry the category ‘C’ mark for identification.
After carrying out the necessary tests on the ITL Tools, the material Nylon11, which makes these tools unique, more than meets this additional specification, confirming once again that these ITL insulated tools are the best that money can buy.
ITL is the only supplier that adopted the material Nylon 11 for the reasons stated. Nylon is applied by means of injection moulding rather than the easier to apply dipping alternative used for PVC.
So when you need to re-stock your tool kit, make sure your tools are from ITL, your first and best choice for protection !