Tag Testing The risk is not just of electric shock but of fire. Check your fire insurance cover as tag testing may be required for cover in the event of electrical fires.
A visual inspection cannot identify internal wear and tear which can lead to fire. This is especially a concern with multi-plugs, double-adaptors and extension cords.
Consider the cost and quality of your multi-plugs as you generally get what you pay for and their overload protection does wear out which can lead to fire.
As for double-adaptors; work places might do well to ban these altogether as they have no overload protection and rely solely on people using them wisely.
I agree with
@Steven Carpinter's observations although I count myself fortunate to have worked for more than one organisation that takes electrical safety (and all aspects of H&S) very seriously with only items with current tags permitted to be in use. This rule comes into its own in work environments with appliances coming and going, for example contractors and engineers using their own gear.
If you work in an organisation that is not yet managing electrical safety holistically, starting with a test n tag regime is a great way to get a finger on the pulse and feedback to senior management. Testing can flag a wide range of issues such as the prevalence of extension cords, multi-plugs, double-adaptors, ground pins, modified guards, leaking microwaves, strained cables under height-adjustable desks and other horrors.
I have a preference for engaging a third party tester as opposed to getting a staff member trained. I have known trained staff members to work well in the accommodation industry with many hairdriers, toasters and irons to check. However in a more complex industrial or workshop setting, a third party tester is invaluable.
Back to
@Jim at SAMs' question. Some tips to reduce the bill might be to switch to battery powered hand-tools where possible and invest in hard-wiring and adequate wall sockets to reduce use of extension cords and multiplugs. Finally, from memory, I believe the testing frequency for office equipment such as computers and screens is two-yearly. Perhaps this is an area in which you can make at least some savings.