[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR183.330]

[Page 290-291]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 183_ELECTRICAL INSTALLATION--Table of Contents
 
            Subpart C_Power Sources and Distribution Systems
 
Sec. 183.330  Distribution panels and switchboards.

    (a) Each distribution panel and switchboard must be in as dry a 
location as practicable, adequately ventilated, and protected from 
falling debris and dripping or splashing water.
    (b) Each distribution panel or switchboard must be totally enclosed 
and of the dead front type.
    (c) Each switchboard must be fitted with a dripshield.
    (d) Distribution panels and switchboards that are accessible from 
the rear must be constructed to prevent a person from accidentally 
contacting energized parts.
    (e) Working space must be provided around all main distribution 
panels

[[Page 291]]

and switchboards of at least 610 millimeters (24 inches) in front of the 
switchboard, and at least 455 millimeters (18 inches) behind the 
switchboard. Rear access is prohibited when the working space behind the 
switchboard is less than 455 millimeters (18 inches).
    (f) Nonconducting mats or grating must be provided on the deck in 
front of each switchboard and, if accessible from the rear, on the deck 
in the rear of the switchboard.
    (g) All uninsulated current carrying parts must be mounted on 
noncombustible, nonabsorbent, high dielectric insulating material.
    (h) Equipment mounted on a hinged door of an enclosure must be 
constructed or shielded so that a person will not accidentally contact 
energized parts of the door mounted equipment when the door is open and 
the circuit energized.
    (i) In the design of a control, interlock, or indicator circuit, the 
disconnect device and its connections, including each terminal block for 
terminating the vessel's wiring, must not have any electrically 
unshielded or uninsulated surfaces.
    (j) Switchboards and distribution panels must be sized in accordance 
with Sec. 111.30-19(a) in subchapter J of this chapter.

[CGD 85-080, 61 FR 997, Jan. 10, 1996, as amended by CGD 97-057, 62 FR 
51050, Sept. 30, 1997]