General Requirements and Electrical Definitions
The E1 exam begins with the administrative and definitional rules that control every later inspection. Chapter 34 of the IRC contains general requirements, and Chapter 35 defines the terms used throughout the electrical chapters. Questions often turn on whether equipment is approved, listed, labeled, accessible, or readily accessible.
Core rules
- Electrical installations must comply with NFPA 70 except where the IRC amends it. Answer from the adopted IRC text when it differs from unamended NEC memory.
- Equipment must be approved by the authority having jurisdiction and installed according to its listing and manufacturer instructions. Listing is a recognized testing laboratory's published evaluation; labeling is the mark on the product. Neither replaces the AHJ's approval.
- Work must be mechanically secure and protected from physical damage. Connections must be tight, and conductors must not be damaged by bending, abrasion, or heat.
- Access matters. Accessible means close approach is possible without removing building finish. Readily accessible means no tools, no removing obstacles, and no climbing over or moving stored goods.
- Learn conductor terms. The grounded conductor is the neutral; the grounding conductor is the equipment grounding conductor; bonding makes metal parts electrically continuous.
Worked example
A receptacle is installed behind a built-in refrigerator. Is it readily accessible? Reaching it requires moving the appliance, so it is accessible but not readily accessible. If a code section requires only an accessible outlet, the installation can be acceptable; if the section requires ready access, it is a violation. The definition, not habit, decides.
Traps
- Confusing grounded and grounding conductors.
- Treating listed, labeled, and approved as synonyms.
- Ignoring manufacturer instructions.
- Assuming the IRC is identical to NFPA 70 in every detail.