Marine Electrical Site
Tony Brooks
Electrical notes on it.
I hope you will find it usefull
www.reading-college.ac.uk/marine
Tony Brooks
Ayesha
Martin McArthur
the way, than up comes a site that explains it all in clear and simple
terms!!!
This looks like a really useful site, will investigate further.
Martinmac
the q
"Tony Brooks" <mar...@reading-college.ac.uk> wrote in message
news:c6897r$92ace$1...@ID-211871.news.uni-berlin.de...
low down as possible for stability. I think this contravenes current
guidance, and possibly BSS regulations in that the batteries should be
mounted above the water line so the bilge pumps would keep running for as
long as possible if sinking...and the batteries should be ventilated
overboard and preferably not mounted in the engine compartment due to
explosive gases.
This is a combination of information read in Practical Boat Owner and as
stated to me by a friend who is a BSS inspector, who gave my boat a once
over last weekend as I am bringing her up to standard for the test.
The Q
Tony Brooks
"the q" <theqno...@yahoo.com> wrote in message
news:96Uhc.35814$Y%6.46...@wards.force9.net...
The BSS only states adequate ventilation for batteries. I agree about
keeping them above bilge water level, but you will see the reader is refered
to the relevent regulations. When you ahve been arround boats as long as I
have, you will have seen some very odd battery locations.
Tony Brooks
Chris Lowe
martin wrote:
> I always wondered why they were stored so low down in U boats and
> submarines.
Balast! on a diesel sub the batteries can be significant amount of the
total displacement
Hugo 'NOx' Tyson
martin <m...@privacy.net> writes:
> I always wondered why they were stored so low down in U boats and
> submarines.
Because they're a substantial mass. To make it float the right way up.
Boat Safety Scheme Office
> news:96Uhc.35814$Y%6.46...@wards.force9.net...
> > > I note that the information states that batteries should be mounted as
> > low down as possible for stability. I think this contravenes current
> > guidance, and possibly BSS regulations in that the batteries should be
> > mounted above the water line
> > Tony Brooks replied
> The BSS only states adequate ventilation for batteries.
Tony got there before I was able to. Extracts from the regulations
(www.boatsafetyscheme.com) are as follows (PS Tony, I have only
managed a quick skim of your site, but it seems very comprehensive.)
Part three – electrical installations
You can reduce the risks by making sure that batteries are stowed in a
ventilated area, that batteries and cables can’t move around,
that your fuses and circuit-breakers are correctly rated for the
circuits they protect and that wear and tear hasn’t left your
system vulnerable to failure.
To stop batteries from moving around, which could cause damage to
their terminals and connections, or cause them to spill corrosive
liquids over the boat, they must be securely fixed.
A source of ignition, like batteries, must be kept away from potential
fuel sources to reduce the possibility of fire or explosion. So,
batteries can be kept in the engine room, but they must never be under
or next to a petrol or LPG tank, cylinder, stopcock, pipe or filter.
It’s a good idea to keep your boat’s batteries at least
half a metre (around 18ins) away from any petrol or LPG equipment.
If your batteries are kept in confined spaces in compartments
it’s essential that the build-up of flammable hydrogen gas is
prevented. To achieve this, battery compartments must be properly
ventilated.
To prevent sparks being created by metal objects or tools touching the
top of batteries, which could act as an ignition source and start a
fire or explosion, the positive and negative terminals of all
batteries must have insulated covers in place. Some batteries
don’t have individually covered terminals, and traditional
batteries have exposed connectors between the cells – in these
cases you must cover the whole top surface of the battery. Covering
batteries will also reduce the likelihood of electrical sparks caused
by touching the terminals with a metallic object. [3.1]
Part four - electrically propelled vessels
The particular risks related to electric boats are mainly due to the
presence of large banks of batteries and associated charging quipment.
Hydrogen, a highly flammable gas that is lighter than air, is the
by-product of battery charging. This Part of the Standards focuses
mainly on minimising the risk of hydrogen causing a fire or explosion.
Hydrogen and air can be a very explosive mixture and especially
towards the end of a charging cycle when significant quantities of
hydrogen can be given off by the bank of batteries. To reduce the risk
of a build-up of gas, leading to an explosion, batteries must be
properly stowed and adequately ventilated. It’s recommended that
your battery stowage and ventilation arrangements comply with the
I.E.E. Regulations for the Electrical and Electronic Equipment of
Ships, where relevant. [4.2]
Go boating - Stay safe
Rob@BSS Office
the q
"Guy Fawkes" <dave...@blueyonder.co.uk> wrote in message
news:s8gi8095r18f7uuag...@4ax.com...
> On 23 Apr 2004 09:04:47 -0700, bss.en...@boatsafetyscheme.com
> (Boat Safety Scheme Office) wrote:
>
>
Thanks for the comments, I had downloaded and read the BSS before, however
I had heard from several different people including examiners that, the
Examiners copy of the regulations is much more comprehensive than that
published for public consumption. It appears to me that the friend may be
"over requiring" on various items maybe requiring what is "best practice"
for new build.
As an additional question I know that the BSS doesn't require flame failure
devices on PRE 1998 cooker instalations however He states that as a (newly
qualified) Corgi Man he could not give my boat a pass for the LPG tests
(because of no flame failure devices) and that in particular some insurers
(eg Navigators and General) would refuse cover. Also my current system has a
manifold in the gas locker and each seperate item has a single pipe line to
it. He states that now the installation should be changed to a single "
daisy chain" line with a test point at the end.
I have no reason to believe he is trying to " wind me up" but I wonder
whether he has been blinded by best practice.
>
David Balfour
Only wished you covered dynostarts tho'!
David
"Tony Brooks" <mar...@reading-college.ac.uk> wrote in message
news:c6897r$92ace$1...@ID-211871.news.uni-berlin.de...
Ian Sandell
<dave...@blueyonder.co.uk> wrote:
>
>My dad lost the end of his middle finger about 1977/78 sometime, car
>12vdc powered electric atco cylinder lawnmower, stalled on a twig, he
>goes to pull twig out without remembering to kill the power first, and
>this was a guy with a masters ticket steam and electric for some 20
>years and was currently chief engineer for south east asia for a
>rather large and well known shipping / logistics company, not a
>clueless asshole (as martin keeps reminding me) usenet yottie.
>
>
Sounds pretty inapt to me. Most clueless asshole usenet yotties manage
to mow the lawn without cutting their fingers off.
Ian
Ronald Raygun
> My dad ...
> was currently chief engineer for south east asia for a
> rather large and well known shipping / logistics company,
You don't mean ..., no, it couldn't be.
Tell us it wasn't UPS.
Hugo 'NOx' Tyson
Guy Fawkes <dave...@blueyonder.co.uk> writes:
Are you sure you don't mean Peninsular and Oriental (Steam Navigation
Company)?
Ronald Raygun
> On 26 Apr 2004 17:00:31 +0100, Hugo 'NOx' Tyson
> <hm...@surfingsuggestionx.co.ukx> wrote:
>>Guy Fawkes <dave...@blueyonder.co.uk> writes:
>>>
>>> pacific and oriental to you matey
>>
>>Are you sure you don't mean Peninsular and Oriental (Steam Navigation
>>Company)?
>
> I do indeed, I am just well pissed as a result of being well pissed
> off as a result of some cunt stealing my bike.
It was probably the UPS courier "getting you" for all that unpleasantness
with the court case.