[Public-List] Marine Survey

[Roger L. Kingsland]

The regs say; "If a battery was allowed to reposition itself
indiscriminately at the will of the forces that occur when a vessel
(especially smaller boats with quicker motion) is operated in waves, or
while being transported over land with its battery installed, the battery
could become damaged." 

Does that mean, "bouncing batteries break"?



-----Original Message-----
From: public-list-bounces at lists.alberg30.org
[mailto:public-list-bounces at lists.alberg30.org] On Behalf Of Mike Lehman
Sent: Monday, April 26, 2010 1:41 PM
To: A30 Public List
Subject: Re: [Public-List] Marine Survey


Thanks Jim, 
 
Okay then, here is the offical word - but it just says the batteries have to
be secured and you MAY use a box...
 
183.420 - Batteries
(a) Each installed battery must not move more than one inch in any direction
when a pulling force of 90 pounds or twice the battery weight, whichever is
less, is applied through the center of gravity of the battery as follows:
 

(1) Vertically for a duration of one minute.
(2) Horizontally and parallel to the boat’s center line for a duration of
one minute fore and one minute aft.
(3) Horizontally and perpendicular to the boat’s center line for a duration
of one minute to starboard and one minute to port.

If a battery was allowed to reposition itself indiscriminately at the will
of the forces that occur when a vessel (especially smaller boats with
quicker motion) is operated in waves, or while being transported over land
with its battery installed, the battery could become damaged. If the battery
casing ruptures, the electrolyte may run out. If a battery terminal loosens,
poor contact or sparking could occur. The electrolyte is usually sulfuric
acid which can severely attack many metals and other materials. Such attack
on fuel system components has the potential of causing fuel lines and
fittings to fail and leak fuel. Movement of a battery could cause the
battery terminal to come in contact with grounded items, resulting in
sparking.
Therefore, the regulation calls for restraint of the battery in the
horizontal and vertical directions. A battery as installed by a manufacturer
may not move more than one inch when subjected to a test force for a one
minute duration in each of three directions: vertical, horizontal - fore and
aft, and horizontal - port and starboard. The test force selected is 90
pounds, which is approximately twice the weight of the popular size of
marine battery used in small boats, which may be subject to high
accelerations. For this reason, 90 pounds was selected as the maximum that
needed to be applied. For batteries weighing less than 45 pounds, a force of
twice the battery weight is specified. This test force is to be applied
through the center of gravity of the battery.
The commercially available plastic battery boxes may be used to install a
battery; however, it may be necessary to provide means within the battery
box to prevent excess movement of the battery. The materials used for
restraining battery movement within a battery box should be selected with
regard to potential deterioration by the electrolyte. The battery box must
be fastened in such a manner that the battery installation will comply with
this section of the regulation.
It is recommended that the use of materials to wedge the battery in a
battery box be described in the boat’s owners manual to affirm its intended
use.

 
Mike Lehman 

 
><((((º>`·.¸¸.·´¯`·.¸><((((º>`·.¸¸.·´¯`·.¸><((((º>

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