PHASE RELATIONSHIP When you connect the generator load to the panelboard, be careful to match the cable markings to the panelboard terminals. The same phase relationship should be maintained throughout the wiring system from the generator to the load. You may see terminals marked with numbers, such as L1, L2, L3, and L0 (fig. 3-12, view A) or the letters and symbols A0, B0, C0, and N (fig. 3-12, view B). Wire in different parts of the system may be marked with numbered, lettered, or colored tape. (The color sequence is black, red, blue, and white.) Either way, the phase sequence is the same. You may have to "ring out" (identify) unmarked cables or conductors in the conduit (fig. 3-12, view C) before connecting them to the power source or load.

This identification process can be accomplished in any one of several ways. You may use a bell and battery, buzzer and battery, or ohmmeter, for example. Any of these devices may be used to check for continuity through each conductor to ground (a conduit, for example). After a conductor is identified, it is then marked. 

PORTABLE POWER DISTRIBUTION PANELBOARDS  Portable, weatherproof, power distribution panelboards are available, similar to the one shown in

Figure 3-12.- Conductor identification.

figure 3-13. Load cables can be plugged into the receptacles along the front (fig. 3-13, view A). With the cover raised (fig. 3-13, view B), access to the circuit breakers and test jacks is provided. This panelboard is an advanced-base distribution center. A single-line Portable generators and panelboards can be placed into service quickly and with relatively little effort, compared to a permanent installation. Do not let expedience cause you to become careless, though, in placing the equipment and routing the load cables. Careful planning can result in a much safer and more diagram of the bus and circuit breakers is shown in efficient installation for both you and your fellow figure 3-14. Seabees.

Figure 3-13.- Portable power distribution panelboard.

Figure 3-14.- Diagram of the portable power distribution panelboard. GENERATOR WATCH While standing a generator watch, you must be alert and respond quickly when you recognize a problem. You might not have control of every situation but at least you can secure the generator and prevent serious problems. Your primary purpose is to produce power in a safe and responsible manner. You may notice maintenance or repair actions that need to be rectified but do not require immediate attention and do not affect your watch Make note of these problems so that they will be taken care of by the repair crew. In addition, concentrate on doing your job properly, and your efforts will pay off.

A generator watch involves performing operator maintenance, maintaining the operator's log, operating a single generator, or operating paralleled generators.