Molly Ayala
Electrical service laterals are underground facilities that transmit electricity from a common source to an end-user. They are typically made of conductors, such as copper or aluminium, and are used to distribute electricity from the utility's electric supply system to the service point or customer's premises. Service laterals are often buried underground due to aesthetic reasons or zoning laws, especially in residential areas, while overhead lines are standard practice in other regions.
| Characteristics | Values |
|---|---|
| Definition | Overhead conductors between the utility electric supply system and the service point |
| Type | Underground conductors |
| Usage | Electrical supply, gas supply, water supply, sewage, communications |
| Location | Public right-of-way or underground facility easement |
| Connection | Connects an end user's building to a main utility line |
| Components | Pipes, fittings, valves, terminal boxes, meters |
| Standards | NEC (National Electrical Code) specifications for electrical installations |
| Conductors | Service lateral conductors, Service drop conductors |
| Exceptions | May not be covered by NEC if located on the utility side of the service point |
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What You'll Learn
Service laterals are typically underground
Service laterals are typically understood to be underground conductors, while overhead conductors are known as service drops. Service laterals refer to the underground conductors between the utility's electric supply system and the service point. They are used to transmit, distribute, or furnish electricity, gas, communications, or water from a common source to an end-use customer.
In the context of electrical distribution systems, service laterals are the underground conductors that connect the utility's electric supply system to the customer's service entrance equipment. This equipment typically includes circuit breakers, switches, fuses, and their accessories, which are connected to the load end of the service conductors. Service laterals may be run from poles or transformers, with or without terminal boxes, as long as they begin at the service point.
The distinction between service laterals and service drops is important for understanding how different types of connections operate within power distribution networks. In residential areas, for example, service laterals are often buried underground due to aesthetic reasons or zoning laws, while service drops are used where overhead lines are standard practice.
In some cases, the distinction between service laterals and service entrance conductors can be unclear. For instance, in a commercial compound with multiple buildings supplied by a central transformer, the service lateral conductors may be considered service entrance conductors once they pass through the meter transformer coils. However, this interpretation may vary, and it is important to consult with relevant authorities to determine the appropriate classification and installation methods.
The National Electrical Code (NEC) provides specifications and definitions for electrical installations, including service laterals and service drops. However, it is important to note that the coverage of the NEC depends on the location of the service point, which is generally determined by the utility. Conductors located on the utility side of the service point may not be considered service conductors and, therefore, may not be covered by the NEC.
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They are used to transmit electricity
Electrical service laterals are used to transmit electricity from a common source to an end-user or customer. They are typically understood to be underground conductors, as opposed to overhead conductors, which are known as service drops. Service laterals are often buried underground due to aesthetic reasons or zoning laws, while service drops are used in areas where overhead lines are standard practice.
Service laterals are defined in the National Electrical Code (NEC) as the overhead conductors between the utility electric supply system and the service point. They are the underground service conductors that connect the electric utility supply system to the service point, which is typically a terminal box, meter, or other enclosure. If there is no terminal box, meter, or enclosure, the point of connection is considered to be the point at which the service conductors enter the building.
Service laterals are an important part of electrical distribution systems, providing electricity to residential, commercial, and industrial buildings. They are connected to the load end of service conductors and are intended to constitute the main control and cutoff of the electricity supply. The service panel will contain a "main" fuse or circuit breaker that controls all of the electric current entering the building, as well as smaller fuses or breakers that protect individual branch circuits.
In the context of electricity transmission, service laterals are distinct from service drops, which refer to the overhead conductors running from the utility pole or other overhead utility electric supply systems to the building or structure's service point. Service drops provide the building with electrical voltage, typically in the form of two 120 V lines of opposite phase, allowing for 240 V connections for high-demand devices and 120 V connections for lighter loads.
Overall, electrical service laterals play a crucial role in transmitting electricity from the supply system to end-users, ensuring a safe and controlled distribution of electrical power.
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They are also used for gas, water, and sewage
Electrical service laterals are typically understood to be underground conductors that connect the utility's electric supply system to the service point. While the specific materials used for electrical service laterals were not immediately clear, the National Electrical Code (NEC) provides specifications and a clear definition of service laterals.
Now, when it comes to gas, water, and sewage laterals, a different set of materials is used, each with its own unique considerations:
For gas laterals, materials such as steel or polyethylene pipes are commonly used. These pipes are designed to withstand the high pressures and stringent safety requirements associated with natural gas distribution.
Water service laterals, on the other hand, often utilize materials like ductile iron, copper, or PVC (polyvinyl chloride) pipes. Ductile iron is known for its durability and strength, making it suitable for water distribution systems. Copper pipes are also a popular choice due to their corrosion resistance and longevity. PVC pipes offer an affordable and flexible option for water laterals.
Sewer laterals have traditionally been made from cast iron, known for its strength and durability. However, cast iron is susceptible to corrosion and can be challenging to install and repair due to its weight. Modern alternatives include ABS (a plastic material similar to PVC), HDPE (high-density polyethylene), and composite pipes. HDPE pipes are flexible, corrosion-resistant, and have a long lifespan, making them an increasingly popular choice. Composite pipes, made from a combination of materials like plastic and fiberglass, offer a balance of strength and flexibility but tend to be more expensive.
When choosing materials for gas, water, and sewage laterals, factors such as durability, corrosion resistance, flexibility, and cost are all important considerations to ensure the long-term performance and maintenance of these essential systems.
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Service laterals are connected to a building's wiring system
Service laterals are underground conductors that transmit electricity from a utility's electric supply system to a building's wiring system. They are typically used in residential areas due to aesthetic preferences or zoning laws, while overhead lines (known as service drops) are used in areas where these are standard practice.
Service laterals are an essential component of a building's electrical system, providing the connection between the utility's supply and the building's wiring. They are typically made of conductive materials such as copper or aluminium, which facilitate the transmission of electricity.
The service lateral connects to the building's wiring system at a designated point, often referred to as the service point or point of connection. This point is usually located where the service lateral conductors enter the building, either through a terminal box, meter, or other enclosure. In some cases, the service point may be at the point of attachment of the service drop to the building, depending on the specifications of the utility company.
The service lateral provides electricity to the building's wiring system, which consists of branch circuits that distribute power to various outlets and appliances. The wiring system is designed to handle different voltage requirements, with 240 V circuits used for high-demand devices such as air conditioners and water heaters, and 120 V circuits used for lighting and small appliance outlets.
It is important to note that service laterals are subject to specific regulations and standards, such as the National Electrical Code (NEC) in the United States. These regulations define the requirements for electrical installations and the distinction between service laterals and service drops. Additionally, service laterals must comply with permitting and inspection requirements to ensure safe and proper installation.
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They are defined by the National Electrical Code (NEC)
The National Electrical Code (NEC) is a set of standards and practices for electrical systems in the United States. It is a comprehensive and standardized source that codifies the minimum requirements for safe electrical installations. While not a US law, it is often mandated by state or local laws, and anything less than the NEC is considered illegal in those places. The NEC is composed of an introduction, nine chapters, annexes, and an index. The introduction covers the purpose, scope, enforcement, and general rules and information. The first four chapters cover definitions, rules for installations, circuits and protection, wiring methods and materials, and general-purpose equipment. The next three chapters deal with special occupancies, equipment, and conditions.
The NEC provides clear definitions of electrical terms and components, including service laterals. Service laterals are defined in the NEC as the conductors between the utility electric supply system and the service point. They can be either overhead or underground, depending on the context. In residential areas, for example, service laterals are often buried underground due to aesthetic reasons or zoning laws, while service drops are used in areas where overhead lines are standard practice.
The NEC also includes specific rules and requirements for electrical installations. For instance, it specifies how many circuits and receptacles should be placed in a residential dwelling and how far apart they should be based on cord length. It also requires that all receptacles in wet locations have a ground fault circuit interrupter (GFCI) for safety.
The NEC is revised every three years by the National Fire Protection Association's Committee to incorporate the latest technology and safety advancements. This ensures that the NEC remains up-to-date and relevant to evolving electrical installations and practices.
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