Transcript BS 8519:2010

BS 8519- Code of Practise
Selection and Installation of Fire Resistant Power and
Control Cable Systems for Life Safety and Fire Fighting
Applications- Code of Practise
Name of the speaker
Jobtitle
Location – Date
www.drakauk.com
B.S. 8519:2010
• New Code of Practice for the selection
of fire-resistant cables and systems for
life safety and fire fighting applications
• Provides guidance and
recommendations and links to
Approved Document B (Part B) of the
building regulations, B.S. 9999, B.S.
7846 cable standard and tests defined
in B.S. 8491 and BSEN 50200:2006
• Recommends cable survival times and
installed cable system requirements
• Does not take precedence over B.S.
5839 for alarm systems and B.S. 5266
for emergency lighting
Background to B.S.8519:2010
• Modern building technology involves “Fire Safety Engineering”
• Active Fire Safety systems such as sprinklers and smoke
evacuation systems are required to operate both in evacuation and
fire –fighting phases.
• In this context it was considered that the Cable performance
requirements contained in BS 7846 were inadequate for
certain applications.
–Smoke ventilation systems
–Electrically operated fire doors and curtains
–Pressurization fans
–Sprinklers and wet-riser pumps
B.S.8519:2010
•
Complex Buildings have a Fire Safety Engineering
Infrastructure
•
Greater emphasis on Circuit Integrity
•
Cables must have a suitable performance level
•
New Tests have been introduced
B. S. 8519:2010
• Defines new Fire Performance (Circuit Integrity) requirements for
Power cables
• Does not cover:
•
Cables < 20mm in Diameter
•
Wiring systems installed in Conduit
•
Wiring systems for Alarm and Sounder circuits (BS 5839)
•
Also defined are requirements for cable fixings and joints,
diverse cable routes, and cable support systems
Cable Classes -Ratings
•
B S 8519 defines two types of application:
•
Life Safety systems – Systems that must remain operational
to alert, evacuate, and protect people
– Category 1- 30 minutes
– Category 2- 60 minutes
•
Fire Fighting systems - Active systems for protecting and
assisting fire-fighters
– Category 3- 120 minutes
•
3 Categories of cable performance are defined
Fire survival times: Category 1
For means of escape 30 minutes fire survival time, cables shall:
•
For Power cables >20mm meet B.S. 8491 for 30 minutes
•
For Control cables meet BSEN 50200 test for 30 minutes
Fire survival times: Category 2
•
For means of escape 60 minutes fire survival time cables
shall:
•
For Power cables >20mm meet B.S.8491 for 60 minutes.
•
For Control cables meet BSEN 50200 test for 60 minutes and
for 120 minutes with water spray as per BS 8434-2
Fire survival times: Category 3
For Fire Fighting 120 minutes fire survival time cables shall
•
For Power cables >20mm meet B.S. 8491 for 120 minutes
•
For Control cables meet BSEN 50200 test for 120 minutes
and the 120 min survival period when tested In accordance
with Annexe B of BS 8519 (115 minutes fire and impact at
930°C followed by 5 minutes of fire, water and impact)
B.S. 8519 cable classifications
The Fire Tests BSEN 50200
•
BSEN 50200 + water Spray
•
Test is integrated But:
– Impact is indirect
– Water is applied via a
sprinkler head not a
pressure hose
The Fire Tests- BS 8491
•
Based on the BS 7846 test but is
Integrated.
•
Constant temperature attack at
842°C
•
Direct mechanical impact = 10 N
•
Pressure Water jet (6.3mm
hose,12.5l/m) during final 5
minutes of test - to simulate fire
hose
Draka’s Offering
Firetufpowerplus utilises additional fire barriers and new Halogen
Free, Low Smoke material technology, compared to B.S.7846 F2
cable FTP. It has conventional wire armour design, and complies
with B.S.7846, and B.S.8491 to the 120 minute rating (category 3)
FTP120 has been independently tested by LPCB and has a full
approval from BASEC
Approved Document B –Protected
Power Circuits
•
Critical electrical Circuits must function
•
Cables must be sufficiently robust
•
Cable routes, physical protection and cable supports and
joints, if used, shall not reduce functionality in the event of fire.
FTP 120 Applications
FTP120 now LU Approved
•
•
Draka is now the only manufacturer with LU approval for BS
8519 applications
LU are now promoting BS 8519 as the optimum level of
safety, and this level of safety is being specified into ALL LU
designs
Thank you for your attention