If electricity is supplied to a building by underground cables, the shutoff may be in the basement of the building or in

If electricity is supplied to a building by underground cables, the shutoff may be in the basement of the building or in

• A. In a basement of the building
• B. In an underground vault
• C. In the utility room on the ground floor
• D. In the attic

Answer: (B)

If electricity is supplied by underground cables, the shutoff is typically located in an underground vault. This secure, weatherproof chamber houses the service disconnect and is designed to be accessible to utility personnel and fire responders, allowing rapid isolation of the underground feeders without needing to enter the building. Placing the shutoff in a basement, a ground-floor utility room, or the attic would require bringing the disconnect inside the building, which can delay emergency isolation and introduce hazards to interior spaces. The underground vault keeps the switching equipment out of the building envelope while remaining readily accessible.

If electricity is supplied by underground cables, the shutoff is typically located in an underground vault. This secure, weatherproof chamber houses the service disconnect and is designed to be accessible to utility personnel and fire responders, allowing rapid isolation of the underground feeders without needing to enter the building. Placing the shutoff in a basement, a ground-floor utility room, or the attic would require bringing the disconnect inside the building, which can delay emergency isolation and introduce hazards to interior spaces. The underground vault keeps the switching equipment out of the building envelope while remaining readily accessible.