110 and a transformer can be used anywhere…
and has to be carried everywhere.
Or am I missing some serious HSE rules?
Its not so much an HSE rule (the HSE often point out there are very few ‘rules’- they don’t have equipment in their own premises PAT tested for instance) but it tends to be a site rule.
There are two things you can do to make using power tools safer – one is use and RCD the other is use 110v.
110v is favoured for sites because RCDs are quite fragile – and if they get wet or bashed theres the temptation to unplug them and work on without it rather then replace. 110v transformers are more robust, can cope with dirty, wet work sites and but more importantly if they stop working you don’t have the option to skip using them – you have to stop work and find a replacement. They’re a pain in the arse to drag around though if you work on the move.
110v might be better for resale if you’re buying higher end kit (i.e. outside the normal DIY budget).
Conversely I find 110v tends to be cheaper to buy second hand (same with 3 phase)- there tends to be more of a domestic /DIY market for second hand kit, I don’t think trade users buy second hand so much and I guess either market will tend to assume 110v stuff has been worked harder. Makes for some bargains though but I tend to only buy larger semi-portable stuff like table saws etc 110v. A transformer is just too much of a fanny about for hand-held stuff.