CCI Study Guide 2026

Gas meters must be installed outdoors or in dedicated ventilated meter rooms per the IFGC; installation inside occupied building closets is generally prohibited.

Loose cuttings or disturbed soil at the shaft bottom must be removed or cleaned out to ensure proper end bearing.

Per NEC Table 314.16(B), each 12 AWG conductor requires 2.25 cubic inches of box fill volume to prevent overheating and overcrowding.

NFPA 13D covers the installation of sprinkler systems in one- and two-family dwellings and manufactured homes.

Plumbing codes are specifically designed to regulate the installation, alteration, and repair of plumbing systems within buildings. Their primary goal is to ensure the safe and sanitary provision of water supply and the efficient, hygienic removal of wastewater. This prevents health hazards, ensures proper drainage, and protects public safety.

The effective throat of a standard 45° fillet weld equals 0.707 times the leg size; 0.707 × 0.375 ≈ 0.265 inch, which is used in strength calculations.