Fig. 1,006.—Wiring for heating appliances in two story house; plan of basement.
Ques. What precaution should be taken in making joints?
Ans. All wires joined together should be soldered as this insures good electrical contact.
Unsoldered wires are both unreliable and dangerous, since they will corrode from dampness, thus increasing the resistance of the joint so that it may become heated.
Ques. How should joints be finished after soldering?
Ans. They should be covered with rubber tape twisted tightly while it is hot. When the rubber has melted it will adhere to the joint and can be moulded with the fingers. Adhesive tape is then wound over the rubber, the insulation thus being made equal to that which was removed to unite the wires.
Fig. 1,007.—Wiring for heating appliances; plan of first floor.