CFR /  Title 46  /  Part 113  /  Sec. 113.10-7 Connection boxes.

Each connection box must be constructed in accordance with Type 4 or 4X of NEMA 250 or IP 56 of IEC 60529 (both incorporated by reference; see 46 CFR 110.10-1) requirements. [USCG-2003-16630, 73 FR 65201, Oct. 31, 2008]