Cody Casey
A meter pan, also known as an electric meter box, is a device used to route and protect the electrical service conductor at the building's electrical meter box. Installing a meter pan involves mounting the box and the riser pipe, then wiring the cables that run to and from the meter. This requires electrical training and experience, and in some states, an authorized electrician is required to perform the task. This article will provide a step-by-step guide on how to install and wire a meter pan, including important safety considerations and specific wiring techniques for different types of meter pans, such as self-contained meter pans and three-phase four-wire services.
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What You'll Learn
Electric meter boxes house the meter socket
Electric meter boxes, or meter sockets, are an essential component of any building's electrical system. They are typically installed by licensed electricians or utility company personnel and are securely mounted on the exterior of a building for easy access for meter readers. These sockets are constructed from weather-resistant metals like aluminium and steel, designed to protect the electrical connections inside from the elements, such as extreme heat or saltwater air.
The installation process involves connecting the metering socket and metering wires from the current transformer compartment to the meter socket. The meter socket itself is usually located outside the building, with specific height requirements for the socket centre depending on whether it is a pedestal meter or located inside a building in a meter room. The meter room should be easily accessible from the exterior ground level of the building through a solid-core or steel door, ensuring compliance with safety measures.
Meter sockets come in various designs and configurations, depending on the region and utility company requirements. They are equipped with safety features such as tamper resistance, surge protection, grounding provisions, and sealable enclosures to prevent unauthorised access. The metering wires are connected at the current transformer enclosure, and the wiring process involves following specific guidelines, especially when using aluminium conductors.
The meter socket contains simple terminals for landing the wire and jaws for mating with the meter globe's plugs. This setup allows utility companies to safely measure electrical usage and ensure accurate metering and optimal performance. Regular maintenance of the meter socket, including inspection of electrical connections and weatherproofing, is crucial for maintaining the functionality and safety of the electrical system.
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The meter socket contains terminal lugs for electrical cables
An electric meter box, also known as a meter pan, is used to route and protect the electrical service conductor at the building's electrical meter box. The meter socket contains terminal lugs for electrical cables, which are used to connect the meter to the electrical system. The number of terminal lugs can vary depending on the type of service and the number of phases. For example, a three-phase four-wire service requires a seven-terminal safety socket.
The meter socket is usually located on the outside of the building, with specific height requirements for the meter socket centre. The electrical contractor is responsible for installing the metering socket and metering wires from the current transformer compartment to the meter socket. The wires must be sized and colour-coded as indicated in the relevant tables and diagrams. It is important to note that all unmetered compartments should be sealable with padlock-type seals.
When installing an electric meter box, it is crucial to follow local and national electric codes and guidelines. The installation process involves mounting the box and the riser pipe, and then wiring the cables that run to and from the meter. The meter socket hub is placed onto the opening on top of the meter box and fastened with screws. The riser pipe is then held vertically and screwed onto the socket hub. Cable clamps are attached near each end of the pipe for stability.
The electrical meter socket contains three pairs of terminal lugs that hold the main electrical cables running from the service drop. Each black cable (hot) is routed to each outer terminal lug on the lower half of the meter socket. The neutral service conductor should be bonded to the meter base using a grounding screw or bonding terminal. This conductor can be continuous from the weatherhead through the meter socket to the service panel, provided a neutral tap for metering is not required. All neutral taps must be enclosed within the meter enclosure.
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The neutral service conductor bonds to the meter base
An electric meter box is sometimes referred to as an electrical meter pan. It houses the electric meter socket, which holds the main electrical cables running from the service drop. The meter socket contains three pairs of terminal lugs.
When wiring a meter pan, the first step is to mount the box and the riser pipe. Next, the cables that run to and from the meter are wired. This process requires electrical training and experience, and in some states, an authorized electrician must perform the task.
To install the meter socket, hold the plywood backing upright against the wall, aligning it vertically and horizontally with a level. Nail the plywood onto the studs with 1 1/2-inch nails. Place the meter socket hub onto the opening on top of the meter box and fasten it with the supplied screws.
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The meter socket hub is placed on the meter box
An electric meter box, also known as an electrical meter pan, houses the electric meter socket where the electric meter is plugged in. The meter socket contains three pairs of terminal lugs that hold the main electrical cables.
To install the meter socket hub, the first step is to hold the plywood backing upright against the wall, aligning it vertically and horizontally with a level. The plywood is then nailed onto the studs with a hammer and 1 1/2-inch nails.
The meter socket hub is then placed on the opening at the top of the meter box and fastened with screws provided. The riser pipe is held vertically on top of the meter box and its end is screwed onto the socket hub. A level is used to ensure the pipe is aligned vertically.
Next, cable clamps are attached near each end of the pipe, and at 1/3 and 2/3 of its length. The cables are then inserted into the opening at the top of the pipe and dropped down to the meter box. With the meter box cover unscrewed, the cables are pulled from inside, leaving 18 inches of each cable dangling on top of the pipe. These cables are then slipped through the weatherhead.
It is important to note that the installation of an electric meter box requires electrical training and experience, and in some states, it must be performed by an authorized electrician. Additionally, the meter socket should be placed on the outside of the building, with the meter height not exceeding 6 feet nor less than 4 feet above the finished grade or floor below.
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The meter box requires electrical training to install
The installation of a meter box, also known as a meter pan, is a complex process that requires electrical training and experience. It is a device used to route and protect the electrical service conductor at the building's electrical meter box. The process involves mounting the box and the riser pipe, and then wiring the cables that run to and from the meter.
To begin the installation, the plywood backing must be held upright against the wall, ensuring it is level both vertically and horizontally. It is then nailed onto the studs using 1 1/2-inch nails. The meter socket hub is placed on the opening at the top of the meter box and fastened with screws. The riser pipe is then held vertically and screwed onto the socket hub. Cable clamps are attached near each end of the pipe and at 1/3 and 2/3 of its length.
The next step involves climbing up to the top of the rigid conduit pipe using a ladder. The ends of three cables are inserted into the opening and dropped down to the meter box. The meter box cover is unscrewed, and the cables are pulled from inside, leaving 18 inches dangling on top of the pipe. These cables are then slipped through the weatherhead.
It is crucial to follow specific guidelines and codes during the installation process. For example, the meter socket itself should be located on the outside of the building. The meter height should be between 4 and 6 feet above the finished grade or floor, with the reference point being the center of the meter. Additionally, the access to the meter room should be through a solid core or steel door with specific dimensions and security features, such as a latch guard plate and a heavy-duty knobset.
Due to the technical nature of the installation process and the need to adhere to local and national electric codes, it is recommended that only authorized electricians or individuals with the necessary electrical training and experience install a meter box.
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Frequently asked questions
A meter pan is another name for an electric meter box. It houses the electric meter socket where the electric meter is plugged in.
Installing a meter pan requires electrical training and experience. It involves mounting the box and the riser pipe, then wiring the cables that run to and from the meter.
Self-contained meter pans are used for circuits that are 400A and less. All the sensing equipment is inside the meter globe, and the meter socket contains terminals for landing the wire and jaws for mating with the meter globe's plugs.
If the main breaker on the panel says 100A, then there is a 99.9999% chance that you only have wire and a meter base good for 100A.
