These could cause a short circuit where small clearances are involved. (If it is necessary to wear medic alert bracelets, secure them with transparent surgical or adhesive tape or rubber bands.) To avoid the danger of electric shock due to this voltage you should make sure that any major metal elements in the building are bonded to the building electrical earth or ground conductor. This ensures that during a fault all the metal in the building goes to the same fault voltage rather than some of it staying at the outside earth voltage thus reducing the touch voltage. This is known as earthed equipotential bonding with automatic disconnection of supply or eebads.