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Page 191

| Figure 10-13 (cont.) Disconnecting potheads: (B) cross section. |

| Switch Operation |

| The operation of both air and oil switches has been described previously. Emphasis should be placed on the operation of disconnects only when the circuit of which they are a part is de-energized and only when limited amounts of current (very much less than short-circuit currents) are to be interrupted. These devices should also be operated by insulated switch sticks, preferably handled with rubber gloves. |

| The handles of air-break switch levers and of oil switches should be connected to one or more grounds to protect the operator of the switch. |

| When work is done on an air switch to repair or maintain it, it is essential that it be completely and physically separated from the energized circuit. If physical disconnection is impractical, the circuit should be de-energized and the terminals on both sides of the switch must be effectively grounded. In |

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