Isolation Isolation defined cutting off the electrical supply circuit item
of equipment order ensure the safety those working the equip-
ment making dead those parts which are live normal service.
Intruder alarm systems intruder alarm system serves deterrent potential thief and
often reduces home insurance premiums.
Job sheets job sheet job card carries information about job which needs be
done, usually small job.
Magnetic poles The places magnetic material where the lines flux are concentrated
are called the magnetic poles.
Lamp lamp device for converting electrical energy into light energy.
Magnetic hysteresis Magnetic hysteresis loops describe the way which different materials
respond being magnetized.
Magnetic force Magnetic force the force created magnetic field.
Luminaire luminaire equipment which supports electric lamp and distributes
or filters the light created the lamp.
Magnesium oxide The conductors mineral insulated metal sheathed (MICC) cables are
insulated with compressed magnesium oxide
Magnetic field The region space through which the influence magnet can be
detected called the magnetic field that magnet.
Lever lever any rigid body which pivots rotates about fixed axis ful-
crum.
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electricity pass through it.
Maintained emergency lighting maintained system the emergency lamps are continuously lit using
the normal supply when this available, and change over alternative
supply when the mains supply fails.
Intrinsically safe circuit intrinsically safe circuit one which spark thermal effect is
capable causing ignition given explosive atmosphere. Good insulating materials are PVC, rubber,
glass and wood.
Mechanics Mechanics the scientific study ‘machines’, where machine is
defined device which transmits motion force from one place to
another. The unit mass
is the kilogram (kg).
Mass Mass measure the amount material substance, such metal,
plastic, wood, brick tissue, which collectively known body. Load force Distance from fulcrum Effort force Distance from
fulcrum
Levers and turning force lever allows heavy load lifted moved small effort.
Manual handling Manual handling lifting, transporting supporting loads hand by
bodily force. The
mass body remains constant and can easily found comparing it
on set balance scales with set standard masses
