ARM GUY.- A guy wire running from one side of a crossarm to the next pole is called an "arm guy." Arm guys are used to counteract the forces on crossarms that have more wires dead-ended on one side than on the other (fig. 4-9).

STUB GUY.- A guy wire installed between a line pole and a stub pole on which there is no energized equipment is called a "stub guy" (fig. 4-10). A down guy is used to secure the stub pole. This type of guy is

Figure 4-11 .-Push guy. often installed to obtain adequate clearance for guy wires extending across streets or highways.

PUSH GUY.- A push guy, or a push brace, is used when it is impossible to use down guys (fig. 4-11). When it is impossible to obtain sufficient right-of-way for a pole guy, the push brace can usually be installed. The push guy is constructed from an old power pole and a special bracket called a push brace attachment.

CROSSARMS A crossarm is a specially treated wooden member that is secured to a pole and used to mount various types

Figure 4-10.- Stub guy.

Figure 4-12.- Crossarm. of circuit protection devices and to support the conductors. The crossarms used in power distribution come in three common sizes; namely, 3 1/ 4 inches by 4 1/ 4 inches, 3 1/ 2 inches by 4 1/ 2 inches, and 3 3/ 4 inches by 4 3/ 4 inches. The spacing for insulators on the crossarms, as shown in figure 4-12, meets the minimum standards for conductors at all distribution voltages used by the Navy. In your naval service you may come across larger wooden crossarms or crossarms made of steel. These crossarms are designed to support increased strain or to use with transmission lines carrying higher voltages.

SINGLE ARMS Single arms are used on straight lines when no excessive strain needs to be provided (fig. 4-13). When crossarms are installed, every other crossarm faces in the same direction.