Experts from Maun reveal 5 checks every insulated tool user should make before starting a task
Posted by: electime 10th November 2025
Staying safe when working with tools is always important. But when working with electrical systems, extra care is necessary to avoid electric shocks and the risk to life they bring. Whether you’re an electrician, mechanic, heating engineer or DIYer, checking your tools before starting any electrical work is essential.
To keep users safe, tool expert Martin Sharp, Sales Manager at Maun Industries, explains the five checks to remember when using insulated tools.
Look for the double triangle symbol
All tools intended for live, or potentially live, electrical work must have handles that use a non-conductive material that will protect the user from up to 1000V AC/1500V DC and comply with IEC 60900:2018 standards.
Martin says, “Many tools may advertise they are ‘rubber or plastic-coated’, but this does not necessarily mean they are insulated and safe to use on electrical systems. So users must look for the double triangle 1000V symbol to ensure the tools have been tested to IEC 60900:2018 standard before use.
“Some tools may also be stamped with ‘VDE’, which is a good sign, as VDE is the most frequently used company that tests tools to the IEC standards. However, with VDE being one of many companies that carry out the testing, a VDE stamp isn’t an official requirement to prove the tools are correctly insulated and may not always be present. It’s the double triangle 1000V symbol that indicates the tool is suitable for electrical work.”
Check how tools have been stored
While it may be tempting to throw all of your tools into a box or bag, doing so can actually cause problems when it comes to insulated tools.
“Correct tool storage not only helps you stay organised and make tasks quicker to complete, it also ensures your insulated tools stay safe to use,” Martin explains.
“If insulated tools are stored near other sharp tools or objects, such as knives, they can be susceptible to damage, especially the insulated handles. So it’s worth checking if tools have been stored correctly before using them. Ideally, insulated tools should be kept in protective cases or tool rolls that prevent contact with sharp or heavy items.”
Search for any visible damage
Regardless of how tools have been stored, a thorough visual inspection should be carried out before use to check for any damage.
Martin says, “Common tool damage to look out for is things like nicks and cracks to the insulated handles, which can cause tools to become conductive, missing or loose parts, dull cutting edges and rusting. All of these can affect both the overall safety of a tool and how well it can carry out a task.
“Any tools with visible damage should be put aside immediately and should not be used on any future projects.”
Check if tools have been well-maintained
If tools are damaged, it may be a sign that they have not been well-maintained.
“Regularly cleaning and maintaining your tools not only extends their lifespan, but also makes sure they remain fit for purpose and safe to use. When properly looked after, tools will perform as expected, reducing the risks of any accidents occurring.
“For insulated tools, it’s important to regularly remove any debris, especially if this could be conductive. In addition, keep handles free of any grease or oil that could cause the user to lose grip. When cleaning tools, a mild, non-corrosive cleaning solution should be used to avoid damaging insulated elements and reduce the chance of metal parts rusting.”
Consider if you understand how to use the tool correctly
Once you are satisfied with the condition of the tools, the final check to carry out is of your own knowledge.
Martin says, “Understanding how to use a tool is incredibly important. If the tool is new to you, never assume it works the same as a tool you may have used previously. Always check that it’s designed for the task you will be using it for.
“Using a tool for a task it hasn’t been designed for, or a lack of tool knowledge, can increase the risk of accidents happening. If you’re unsure about how a tool works, ask someone who is trained to use it. Or read through product information until you feel confident in using it. If you are still unsure, you can take extra precautions, such as wearing gloves or safety glasses, to reduce the risk of injury.”
