A. When the copper electrode is fused, a green light is always given off.
25. Q. What should be done when a green light is seen?
A. Immediately close off on the steam throttle until a white light re-appears.
26. Q. What is the cause of the fusing of the copper electrode?
A. Usually too high speed of the armature, although should you connect the wires up wrong that the current flowing from the dynamo to the lamp should enter the lamp at the electrode instead of passing through the carbon first, you would get a green light and fuse the electrode.
27. Q. What arrangements have been made so that you cannot connect the wires wrong?
A. The positive binding posts, both at the dynamo and the lamp, have been provided with a much larger hole to receive the wire than has been made in the negative binding posts, and the ends of the positive wire should always be bent or doubled back, so that they will just enter the receptacle in the positive binding posts, but cannot be connected at the negative binding posts.
28. Q. Should the copper electrode and holder become fused until no longer serviceable while on the road, what would you do?
A. Would remove the damaged holder from the lamp and substitute either an iron bolt of sufficient length or a carbon, securing the improvised electrode in the bracket of lamp same as the electrode holder is held, only being sure that the end of the bolt or carbon comes up into the center of the reflector and did not rest on the base of reflector or lamp.
29. Q. What is the difference between a series wound equipment and a compound wound equipment, and what advantages are obtained from the use of the compound equipment.