Always follow Mr Spareys advice from 1948
——————–
Electrical Wiring
It must be admitted that the electrical installation of the average home workshop does,
more often than not, leave much to be desired.
In an understandable eagerness to ''see the wheels go round,'' temporary wiring hook-ups,
often from the house lighting circuits, are perpetrated, and do, alas ! only too often
remain as permanencies. These may continue to function indefinitely without undue
trouble, and the amateur is apt to add other machines, such as a driller or grinder, to the
existing arrangements, until the workshop presents an ideal set-up for a spot of arson!
No electric motor above 1/10 h.p. should ever be connected to the house lighting circuit.
The writer himself suffers from all the amateurs prejudices against "professional safety
factors" yet, in the matter of electrical installation, it is not so much a matter of
prejudice as of plain common sense.
The wise amateur mechanic will, therefore, see to it that a proper power point is fitted
in his workshop, from whence he may wire up his machinery with a heavy "cab tyre"
cable. If this cable is secured to the benches and walls of the workshop, so that it is out
of the way of damage and cannot chafe, metal conduit may be dispensed with, although,
of course, conduit tubing is the ideal.
Another point which is often neglected is the provision of an earthing lead to all
machines. It is quite a common occurrence, especially in damp weather, for the
operator to experience an electric shock, of more or less severity, whenever the metal
portion of a machine is touched. Apart from being extremely disconcerting, this
can be dangerous, as it may cause the operator to "jump" on contact.
Sudden, uncontrolled movements such as this should never be made near revolving machinery!
The simple cure is to connect all the machines by a common wire to an earthing point, such
as an outside stack pipe or a water main. A bare copper wire connection will suffice.
Do not earth to a gas main, it is illegal.