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Page 43

| 3 Installation |

| Power-supply transformers may be installed almost anywhere; on poles, on the ground, under the ground, in the home, on the farm, in industrial plants, shops, offices, in aircraft, trains, ships, and vehicles. The usual precautions used in installing any piece of equipment are also valid in the installation of transformers; these may include: adequate mechanical and structural support; space for access and maintenance; sufficient clearances; barriers and signs for safety to the public; and, means of holding down noise levels. For transformers, one additional precaution is necessary, and that is proper means for dissipating the heat generated by these transformers. |

| Distribution Transformers: Overhead |

| Distribution transformers are very often located outdoors where they are hung from crossarms, mounted on poles directly, or placed on platforms. In general, transformers up to 100 kVA size are mounted directly to the pole or on a crossarm. Larger size transformers (or groups of several transformers) are placed on platforms or mounted on poles in banks or clusters (Fig. 3-1 on page 44). |

| How a transformer is mounted is a matter of considerable importance; the transformer or transformers must stay put and continue functioning even in the midst of violent winds, pouring rain, freezing cold, sleet and snow. Besides weather, there is the danger of the pole itself being hit by a carelessly-driven vehicle. |

| Modern pole-mounted transformers as shown in Fig. 3-2 (on page 45) |

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