[Code of Federal Regulations]
[Title 46, Volume 1]
[Revised as of Octobery 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR38.15-15]

[Page 497]
 
                           TITLE 46--SHIPPING
 
         CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY
 
PART 38_LIQUEFIED FLAMMABLE GASES--Table of Contents
 
                   Subpart 38.15_Special Requirements
 
Sec. 38.15-15  Electrical installations-- TB/ALL.

    (a) All electrical installations shall comply with the requirements 
contained in this subchapter and in subchapter J (Electrical 
Engineering) of this chapter for tank vessels, except as otherwise 
specified in this part.
    (b) Spaces containing cargo pumps, compressors, and piping are 
considered as equivalent to a tank vessel pumproom, and no electrical 
devices, except Coast Guard approved intrinsically safe devices, shall 
be installed in these spaces. Electric motors shall be segregated from 
these spaces by a gastight bulkhead. Electric lighting of the explosion-
proof type may be installed in these spaces provided all switching is 
done from outside the space.
    (c) All cargo tanks, piping, valves, etc., shall be effectively 
grounded to the vessel's hull. Tanks with an insulated inner shell 
(primary barrier) shall have an effective grounding bond to the outer 
shell (secondary barrier) or to the vessel's hull.
    (d) Electric submerged motor cargo pumps may be used, when in 
compliance with the following requirements and subject to approval by 
the Commandant.
    (1) Design details of the submerged motor pump, with an evaluation 
of the cooling efficiency of the product being pumped, shall be 
submitted.
    (2) Provisions shall be made to exclude air from the tanks 
containing cargo in either vapor or liquid phase. The pump motor shall 
be deenergized when this condition is not satisfied.
    (3) A liquid level sensing device shall automatically shut down the 
motor and sound an alarm at a predetermined low liquid level. The alarm 
location may be the station from which cargo handling is controlled or 
such other location outside the cargo area as is acceptable to the 
Commandant.
    (4) Details of the power cable, tank penetrations and pump 
connections shall be submitted.
    (5) An auxiliary means of emptying the cargo tanks shall be provided 
in accordance with Sec. 38.10-10(d).
    (6) Means for positively disconnecting the power supply between the 
switchboard and the pump power panel shall be provided, i.e., disconnect 
links, lockable breakers, etc.
    (7) All materials used in the fabrication of the submerged motor 
cargo pumps shall be suitable for use with the liquid cargo at the 
design pressures and temperatures.

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