Series-multiple.
Arrangement of electric apparatus, in which the parts are grouped in
sets in parallel and these sets are connected in series. It is used as a
noun, as "arranged in series-multiple," or as an adjective, as "a
series-multiple circuit or system."
Fig. 302. SERIES-MULTIPLE CONNECTION.
Service Conductors.
In electric distribution the equivalents of service pipes in the
distribution of gas; wires leading from the street mains to the houses,
where current is to be supplied.
Serving.
The wrapping or winding of a cable composed of small size wire, laid
closely and smoothly with a tool called a serving mallet, or serving
block, or by machinery. It serves to protect the cable from wear.
Shackle.
In telegraph lines a swinging insulator bracket for use where wires make
an angle with the pole. A journal box is attached to the pole, like half
of a gate hinge. To this a short iron arm is pivoted so as to be free to
swing through a considerable angle. At its end an insulator is carried
to which the wire is attached. The shackle swings into line with the
wire, or takes a position for two wires corresponding to the resultant
of their directions of pull.