Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations KootK on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Normal and Emergency Lighting

Status
Not open for further replies.
NickParker

NickParker

Electrical
Sep 1, 2017
411
According to ABS Building and Classing Marine Vessels (MVR) 4.8.2, clause 7.13.2, the normal and emergency lighting systems must be independent of each other and designed in such a way that a failure in one system does not cause the other to become inoperative.

Considering this requirement, how should the typical power distribution be configured to comply with the clause? Additionally, does the following arrangement meet the criteria?

We provide emergency lighting fixtures with integral battery backup:
1. Emergency lighting fixtures are powered by the Emergency Distribution Board.
2. The Emergency Distribution Board normally receives power from the Normal power source.
3. In the event of Normal power failure, the Emergency Generator activates and supplies power to the Emergency Distribution Board.
4. During the transition from Normal power to Emergency power, the integral battery within the fixture powers the emergency lighting fixture.

Does this configuration satisfy the requirements of the clause?
 
Replies continue below

Recommended for you

Sort by date Sort by votes
Depends.

In many places the battery inside the fixture lasts long enough to satisfy the requirements.

first find out what it has to do to meet your minimum time period for emergency lighting.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
 
Upvote 0 Downvote
The typical integral e-light battery is specified to last 90 minutes. 46CFR requires 120 minutes. Good luck finding a fixture with an integral battery that lasts 120 minutes.
 
Upvote 0 Downvote
Sure, but with better seat belts ;-)

I just thought it was interesting that there was "Normal power failure" so there ought to be "Abnormal" power failure as well.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! faq731-376 forum1529 Entire Forum list
 
Upvote 0 Downvote
With LED lights there seems to be a lot now with three hours duration.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
 
Upvote 0 Downvote
120 minutes can be achieved but it's going to require some creative specification. There isn't an on the shelf option.

Luckily, there are no rules with regards to foot candles in the maritime regulations. You only need a bulb that turns on. Whether or not it illuminates anything is up to you.
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

NickParker
  • Locked
  • Question
Lighting in the lifeboat area
Replies
1
Views
523
LittleInch
LittleInch
YankeePirate
  • Locked
  • Question
SELF-RIGHTING CATAMARANS AND PIE PAN STABILITY STRUCTURES
Replies
0
Views
428
YankeePirate
YankeePirate
Al James at General Atomics
  • Locked
  • Question
How to Calculate and Determine the Impact of CAVITATION on a Marine Propeller Blade???
Replies
3
Views
188
GregLocock
GregLocock
Chrissy123
  • Locked
  • Question
Morison's equations for drag and inertia force
Replies
3
Views
152
IRstuff
IRstuff
Chrissy123
  • Locked
  • Question
Calculation of dynamic pressure, inertia and drag forces for offshore riser
Replies
2
Views
164
MMM
MMM

Part and Inventory Search

Sponsor

Back
Top Bottom