FM 5-424 PDF

Nira Availability of skilled maintenance personnel. Enter Your Email Address. If the tube holder has push-in wire connectors, release each wire fn inserting a small screwdriver or a nail into the slot next to the connection. The characteristics in the table must match the requirements for the equipment that is being connected to the generator set.

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Table shows common symptoms, causes, and solutions of problems in fluorescent lamps. One method of doing this at each box is to touch the neutral wire and the box to the two ends of the tester.

You can detect a partial ground or short in a light circuit operated from a two- or three-phase source by the dim operation of some lights while others are operating normally.

Cover workbench surfaces and surrounding floor areas with rubber insulation. Remove the fluorescent tube to gain access to the starter. You may use cargo trucks for mounting generator sets, but two-wheeled trailers are more common because they offer greater maneuverability and ease of maintenance. Technical Manual TM Most mobile generator sets produce high noise levels. Map the field unit.

If possible, attach the strap with a grounding clamp; if not, attach it with a bolt. When it is difficult to dm an effective grounding system because the soil is frozen, connect the strap to something that is already grounded, such as a metal building or an underground pipe.

Use Table B to determine whether the existing conduit can accommodate an additional wire. You will usually use a hydraulic bender to bend conduit in excess of 1 inch.

FM Theater of Operations Electrical Systems — Table of Contents Operators must periodically monitor the voltage throughout the distribution system to identify and correct malfunctions in electrical equipment that is connected to the lines. Maintenance skills and the necessary tools and spare parts required for the selected generator must available at the field unit.

After baring the conductor ends of insulation, connect them to the fish tape. Flexible metal conduit, generally called Greenfieldresembles armored cable in appearance but is more adaptable than cable because various sizes and numbers of wires can be pulled into it after it is installed. Enter Your Email Address. To eliminate any possibility of induced heating of iron or steel conduit, both wires of a circuit must travel in the same conduit.

Maintenance, Troubleshooting, and Repair. If they cannot repair them or if replacement parts are required, they must record the problem the defective part number s on DA Form and submit the form to organizational maintenance see DA Pamphlet This metal conduit has a thermoplastic outer-sheath covering similar to that used on Type T wire, the characteristics and uses of which are detailed in Table B When using lead-covered conductors, it must be at least 10 times the interior f, of the tubing.

Before installing the conduit, remove this edge with a pipe reamer or a file to avoid conductor damage. Screw the bushings tightly onto the conduit ends in the boxes. It is also used for distinguishing the different types of AC generators. Revetment shelters are used for air-cooled generator sets that produce from 0.

Put a continuity tester between the breaker end of the hot wire and the ground. When using thermoplastic-covered conductors, the radius of the curve of the inner edge of any field bend must be at least six times the internal diameter of the tubing. Generator Maintenance Regular and systematic maintenance helps ensure that a generator operates as required at all times. The revetment described in this section is designed to shelter one generator set.

Electrical rotating equipment is manufactured to cm at a particular temperature, rated in degrees above ambient temperature. The lamp will not light. The inside surface is enameled to protect the wire insulation and minimize friction when pulling wire.

If the wiring is exposed, you should be able to see the problem by carefully checking the circuit. In the rocky terrain typical of mountainous areas, site selection is the key to providing a good grounding system. This will eliminate unnecessary vibrations.

For example, if a hot wire touches something that is grounded, such as a neutral wire, a grounding wire, or a metal box, it causes a short circuit. A series combination of test lamps, each rated at the estimated voltage, will also serve this purpose.

The conduit straps described in Chapter 2 are preferred for use when mounting conduit in interior wiring systems. Keep grounding rods and straps clean. Complete the following steps in sequence to determine the cable size required:. Use Table to determine the total resistance of the cable when it is connected between the generator set and the load. The individual demands for electrical power and the area to be serviced govern the site selected.

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Table shows common symptoms, causes, and solutions of problems in fluorescent lamps. One method of doing this at each box is to touch the neutral wire and the box to the two ends of the tester. You can detect a partial ground or short in a light circuit operated from a two- or three-phase source by the dim operation of some lights while others are operating normally. Cover workbench surfaces and surrounding floor areas with rubber insulation.

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Fauk As outlined in Chapter 3the inspection checks include normal operation and operation under the rated load. Allow a clearance of 4 to 6 feet if you use combustible materials. The new load is connected to the additional circuit. Using a steady and continuous force, firmly hold the conduit and bender with the bending groove over the conduitpush down on the handle, and step on the footstep to bend the conduit the desired angle. Conduit should be run as straight and direct as possible.

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