Do not fit a high wattage bulb into a shade or fitting designed for bulbs of lower ratings. Some shades give the maximum wattage but if there is no indication, restrict the wattage to 60 W or preferably 40 W. Otherwise overheating may occur and the shade material either melt or ignite. Damage can also be done to the fixed wiring by transference of heat through the lamp- holders; this is particularly the case if it is a close ceiling fitting. Damage can also be done to the flex, if pendant and the flex is not of the heat-resisting type. Read the rest of this entry »
Three main types of domestic, free-standing, portable electric heaters are widely used: radiant, convector and fan heaters. Some appliances combine different heater types, such as a convector plus a radiant bar.
Heat is produced by an element that glows red-hot when power is supplied to it. The heat generated by this action is directed by a highly polished reflector through an open front protected by a metal grill. The element can be externally wound on a ceramic mount or internally mounted in a heat-resistant silica glass tube. Simple switching of the element/s is included and faults can easily be traced. Read the rest of this entry »
