According to NEC Article 110.14(C)(1)(a), for circuits rated 100A or less, when the equipment terminals are rated for 75°C, the 75°C column in Table 310.15(B)(16) must be used to determine the ampacity of THHN conductors. Although THHN conductors can be rated for higher temperatures, their ampacity is limited by the terminal rating.

According to NEC Article 110.26, access to electrical equipment cannot be obstructed by any accumulation of optical fiber cables that prevents the removal of panels or ceiling tiles. Maintaining clear access is essential for safety and proper maintenance of electrical systems.

According to NEC Article 100, a Field Evaluation Body (FEB) can refer to a or b, meaning it can be either a part of an organization or the organization itself responsible for performing field evaluations of electrical or other equipment.

According to NEC Article 110.26(A)(1), when working with electrical equipment that operates at 300 volts-to-ground, and there are exposed live parts on both sides of the workspace, the required working space depth must be 3 feet to ensure safe access for maintenance and inspection.

A guest suite is defined as an accommodation with two or more contiguous rooms that provide living, sleeping, sanitary, and storage facilities. This term typically applies to hotels and similar establishments and is distinguished from a guest room, which typically consists of a single room.

According to NEC Article 100, the term “accessible, readily” refers to equipment or wiring that can be reached quickly for operation, renewal, or inspections without requiring portable ladders or tools other than keys.

According to NEC Article 100, the term used to describe the selection and installation of overcurrent protective devices to ensure that outages are localized to the affected circuit or equipment is “selective coordination.”

According to NEC Article 110.26(A)(1), Table 110.26(A)(1), a minimum working space depth of 3 feet is required for equipment operating at 277 volts-to-ground where there are exposed live parts on one side and no live or grounded parts on the other. This clearance ensures safety for personnel working near live electrical equipment by providing adequate space to work safely.

According to NEC Article 100, the term “within sight” is defined as equipment being visible and located within 50 feet of each other. This ensures safe and convenient access for operation or maintenance without being obstructed by distance or barriers.

NEC Article 100 is the go-to section for definitions, including those for luminaires and lighting outlets. This article provides the necessary terminology for understanding how various components and systems are referenced in the code.

The equipment grounding conductor is the installed conductive path that provides a ground-fault current path and connects normally noncurrent-carrying metal parts of electrical equipment to the system grounded conductor or grounding electrode conductor. This conductor plays a critical role in ensuring safety by providing a reliable path for fault current, preventing electric shock hazards.

NEC Article 100 is the section where “readily accessible” is defined. It refers to the ability to quickly and easily access electrical equipment or devices without the need for tools or extra effort, ensuring safety and ease of operation.

It is True that utilities may include entities recognized by governmental law or regulation, including those acknowledged by public service or utility commissions. These regulations define the scope and responsibilities of utilities.

According to NEC Article 110.26(A)(1), Table 110.26(A)(1), the required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on both sides of the workspace, is 4 feet. This larger working space is necessary to ensure safety and provide adequate room for maintenance personnel working with exposed live parts.

The NEC includes a section dedicated to the definitions of key electrical terms, such as luminaires and lighting outlets, in Article 100. This article is a central location for terminology used throughout the NEC. Other articles, like Article 410, deal with specific requirements for lighting systems but not the general definitions.

According to NEC Article 110.26, access to electrical equipment must be maintained, and it cannot be obstructed by the accumulation of remote-control, signaling, or power-limited wires that prevent the removal of panels or ceiling tiles. This is critical to ensuring proper maintenance and safety for electrical systems.

A bonding conductor or jumper is a conductor used to ensure electrical conductivity between metal parts that must be electrically connected. This is essential for maintaining a low-impedance path to ground and ensuring that all metal parts are at the same electrical potential, which is critical for preventing electric shock and maintaining system safety.

According to NEC Article 110.26(E), switchboards, panelboards, and motor control centers must be located in dedicated spaces to avoid obstructions and ensure safe access for maintenance. They must also be protected from damage to prevent interference with electrical operations or injury to personnel. These requirements ensure that electrical systems are safely installed and maintained.

According to NEC Article 100, equipment or materials that have been evaluated by a Field Evaluation Body (FEB) and found to comply with requirements can be marked with any of these: a symbol, label, or other identifying mark, collectively referred to as “field labeled.”

According to NEC Article 100, a conduit body is defined as a part of a raceway system that provides access to the interior of the system through a removable cover. This makes it easier to install, maintain, or remove conductors within the raceway.

According to NEC Article 110.26(B), access to electrical equipment must remain clear and unobstructed. If CATV coaxial cables accumulate in a way that prevents the removal of suspended-ceiling panels, it would deny the necessary access for maintenance or inspection of electrical equipment, which is not permitted.

The Bonding Jumper, Main is the connection between the grounded circuit conductor (neutral) and the equipment grounding conductor at the service equipment. This bond is essential for proper grounding and ensures that in the event of a ground fault, the current has a safe path to follow.

According to NEC Article 110.26, access to electrical equipment cannot be denied or obstructed by any accumulation of remote-control, signaling, or power-limited wires and cables that hinder the removal of panels or ceiling tiles. This is critical for safety and proper equipment maintenance.

According to NEC Article 100, the term “building” is defined as a structure that either stands alone or is separated from adjoining structures by fire walls.

NEC Article 100 is the section where the definition of an appliance is provided. This article includes key definitions that apply throughout the NEC, ensuring consistency and clarity in the application of electrical standards.