Views:885 Author:luke Publish Time: 09-04-2019 Origin:Site
When carrying out a fire alarm installation, all the materials have to be fire resistant and compliant. This includes everything as well as the cabling that are used. The British Standards recommends the type of cabling that should be used based on fire resistance testing carried out. The most popular cables used in fire alarm installation are PH30 and PH120.
These cables are known as enhanced fire resistant which simply means it has been developed specifically with certain scenarios in mind. Some buildings would require a longer fire alarm system activation and these cables are ideal for those fire alarm installations. For example, larger buildings may involve a multi phase evacuation process so the fire alarm would need to operate for a much longer time.
The cables are tested by being placed in a direct flame and timed until the circuit breaks. From this experiment, they can work out the length of time that cable can survive in direct heat situations, typically around 830°C. The failure point is said to be when the cable does not maintain the voltage or breaks. The cables are then assigned a figure based on the number of minutes it survived, with 120 being the most.
These enhanced fire resistant cables are ideal for places like:
· Shopping Centres
· Railway Stations
PH120 is cable that is suitable for indoor fire alarm installations where the circuit must be maintained for up to 120 minutes. Made with high performance silicone rubber and superior low smoke zero halogen materials.
PH30 is cable that is suitable for indoor fire alarm installations where the circuit must be maintained for up to 30 minutes. Made with high performance silicone rubber and superior low smoke zero halogen materials.
PH30 is a standard version that is suitable for indoor fire alarm installations where the circuit must be maintained for up to 30 minutes while PH120 is an enhanced version that is suitable for indoor fire alarm installations where the circuit must be maintained for up to 120 minutes. Both PH30 and PH120 are made with plain annealed flexible copper as conductor and high-performance silicone rubber as insulation and superior low smoke zero halogen materials as an outer jacket.
The only difference is PH30 shielded with PET Foil and Aluminum Foil but PH120 shielded with Fibre Glass Tape and Aluminum Foil which performances much better during the burning of the fire. For the available types of PH30 and PH120, we have 2 Core, 3 Core, 4 Core, and 1mm2, 1.5mm2, 2.5mm2, 4mm2. For the available packages of PH30 and PH120, we have 100M in Roll, 200M in Roll, and 500M in Wooden Spool. The most popular choices are PH30 2 Core 1mm2 and PH120 2 Core 1mm2. If you are interested in receiving our price list as well as datasheets, please contact us by email or chat on WhatsApp. Even we can provide short free samples before you place an order from us.
In order to guarantee the stable quality of our fire-resistant cables, we invested more than 15 thousand dollars to build up the fire testing chamber in our factory in 2019. We can provide the related testament on PH30 and PH120 under the standard of BS EN 50200 testing method for our customers. If you are interested, you can visit our youtube channel to watch the fire testing video.
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