Brief Answers to Common Questions
Which Softskin Fire Cable is Best?
In terms of fire performance –
Only trust a Fire Cable manufactured by an LPCB or BASEC approved company.
NoBurn Platinum and NoBurn Plus fire cables are fully 3rd Party approved and certified, this means not only are our cables continuously tested, but our materials, documentation records and full manufacturing processes are independently audited several times every year by both BASEC and LPCB.
We recommend you check the BASEC and LPCB live web sites if you have any doubt the certification you have been provided is genuine, still current and cover the standards which you require.
Fastest fire cable to terminate - Why is NoBurn Fire Cable better than all others?
- NoBurn fire cable can be prepared for termination in under 10 seconds – no time-consuming plastic wraps, mica tapes or separate foils to remove; no other fire cable is faster to install!
- NoBurn’s Eze-Prep insulation – both easy to remove or no need to strip the insulation at all to terminate, simply pull back, fix and let go – this leaves no bare copper on show so removes the chance of accidental short circuits. Eze-Prep insulation is resistant to accidental damage and nicks.
- No other fire cable offers better working flexibility or is so easily ‘Dressed’, NoBurn cables stay where you put it whether in a fixed line or shaped to building contours.
- NoBurn Fire Cable is manufactured entirely in the UK.
What are the most important British Standards for fire cable?
The most important standard a fire cable should meet is the current BS 7629 standard which details the many material quality, fire and emission tests and standards for a fire cable required to meet either a ‘Standard’ or ‘Enhanced’ level fire cable classification.
The BS 5839 UK fire system code of practice does not give details of specific cable tests, but it lists the range of cable test standards a fire cable should meet using BS 7629. A cable to BS 5839 26.2d grade is a BS 7629 Standard 30 or 60 fire cable and to BS 5839 26.2e grade is a BS 7629 Enhanced 120 fire cable.
BS 8519 is an additional code of practice that categorises ‘Standard’ BS 5839 fire cable as a Category 1 fire cable and ‘Enhanced BS 5839 fire cable as Category 2, BS 8519 also details an annex B test to a more extreme level of fire testing for an ‘Enhanced’ fire cable and a fire cable complying with this test is termed a Category 3 fire cable, a Category 3 fire cable is recommended for use in BS 8519 for life safety and firefighting systems used in large complex buildings.
The NoBurn range has a fire cable range to meet every class of control cable requirement.
Which NoBurn cable should be used for Voice Alarms?
Current standards for alarm systems which generate Voice warnings are covered by BS5839-8 & BS5839-9:-
To meet with these standards the cable used must be either a BS 7629 Enhanced 120 or BS 7629 Standard 30 or 60 fire performance cable.
Depending on location installed the fire cable may require additional mechanical protection.
What fixings are required for NoBurn Cables?
All Fire Cables must be fixed on surfaces or trays using clips and fixings which offer the same fire protection duration as the cable. Plastic clips must not be used as the main support for fire cable for any surface fixing, even if the cable is housed in plastic conduit, suitable metal clips or fixings must be used.
Fire cable must always be secured correctly and must not be laid unsecured on for example false ceilings. Please also refer to fixing recommendations in BS 5839 code of practice.
Ventcroft offer a full range of metal clips and saddles, colour co-ordinated to suit our fire cables.
What Clip & Fixing Spacing is Recommended?
Clips spacing for surface mounting of both Standard and Enhanced NoBurn fire cables is recommended at 300mm for Horizontal and 400mm for Vertical cable installation.
For fire cables fitted in a cable tray on a surface where the tray or surface is not providing full support of the fire cable, fixing is recommended to be at 300mm horizontal and 400mm vertical spacing using metal ties or clips or equivalent.
A fire cable laid in and fully supported by a cable tray or solid surface does not require additional fixing except where local risk assessment of falling objects during fire conditions may cause a fire cable to move. In these conditions, it is recommended for additional fixing by metal ties at a spacing of 1.5m.
Are Ferrules required for NoBurn Cables?
Ferrules are not required for NoBurn fire cable, this is because of the combination of our damage resistance Eze-Prep insulation material and soft aluminium or copper foils.
What Glands are required for NoBurn Cables
A wide range of Low smoke fire resistant nylon glands are available for general use with Brass and Steel glands also available as alternatives.
Can NoBurn Fire Cables be Joined?
Jointing of fire cable is not recommended and likely to prove time consuming and expensive. The NoBurn range provides user friendly options to avoid the need for joins for most popular sizes of cable, our reels are available in 100m, 200m, 500m, 1000m, 2000m, 3000m & 4000m lengths. If jointing is unavoidable then a fire resistant box with ceramic terminals should be used – often buying a reel length closest to your requirement will be more cost efficient given the cost of joining material and labour time to install.
What NoBurn Cable Reel Lengths are Available?
As detailed above most poplar types are available ex stock on 100m, 200m, 500m, 1000m, 2000m, 3000m & 4000m lengths. Many ex stock, the cost of longer reels is a simply multiple of a 100m reel, no additional charge.
What Sheath Colours of NoBurn Cables are available?
All ranges are available in outer sheath colours of Red and White are always ex stock. Black, Sandstone and Orange sheath colours are often available ex stock on popular types.
We can manufacture virtually any colour and any size of cable, however minimum order quantities and lead times will apply.
Can NoBurn cables be installed under plaster or in a wall?
Yes, but attention should be paid to IEE Wiring Regulations: 17th Edition in terms of cable placement.
Can NoBurn be installed in conduit?
Yes, but in plastic conduit the cable would still have to be fixed using suitable metal clips.
Can Noburn be installed Outside?
Yes, but the use of either a Black or White outer sheath version is recommended due to colour change and fading over time.
What are the Minimum & Maximum Installation Temperatures of NoBurn Cables
Minimum installation Temperature 0° C
Maximum installation Temperature 70° C
What are the Minimum & Maximum Operating Temperatures of NoBurn Cables?
Minimum -40° C to Maximum +90° C.
The cable should not be flexed or bent when either the cable or operating temperature is below the recommended minimum or above the maximum recommended installation temperatures.
Although ‘Standard’ fire cable can survive to operate at 830° C+ and ‘Enhanced’ fire cable for 930° C+ this is only for the limited durations required by fire system test standards. High temperature cables should be used where continuous operation at temperatures higher than 90° C is required. Voltage drop details should be noted for the various continuous operating temperatures.
Is NoBurn fire cable resistant to attack?
No softskin fire cable of this type is specifically resistant to attack, whether from humans or animals, the use of metal containment is recommended if this is a consideration.
We have had no reports of our fire cable being attacked by Rodents and believe the materials and construction provide natural resistance. There are currently no standards which specify details for rodent resistance in cables or systems. Care should be taken if using your own material or method to prevent Rodent attack as it may mean the cable will not perform as it should under fire conditions.
How would a Chlorine Environment affect No Burn fire cable?
Only the aluminium foil at the point of termination is likely to be affected by a Chlorine environment, for example in a Swimming Pool area. This is only likely to occur after 5 years or more and would not affect the cables performance under fire conditions.
Does NoBurn fire cable require segregation?
NoBurn fire can be installed along side other cables, however it is recommended in BS5839 that where fire alarm cables share common trunking, a compartment of the trunking is separated from other compartments by a strong, rigid and continuous partition and should be reserved solely for fire alarm cables.
Although NoBurn fire cable is screened you should note fire alarm electronic equipment manufacturers recommendations regarding separation to avoid electromagnetic interference.
For how long is NoBurn fire cable guaranteed?
NoBurn cable has a minimum fixed design life of 20 years; however, we would expect our cable to exceed this in normal circumstances. We provide a full 10 years’ warranty, subject to our terms and conditions of sale and installation.
NoBurn is one of only a few brands where the time and date of manufacture, all relevant standards the cable meets and unique batch codes is printed along the full length of the cable – so there is never a doubt about the duration a cable has been installed for or what standards it meets.
Does CPR (Construction Products Regulations) affect Fire Cables?
Fire Cables are not affected by the European wide CPR regulations introduced to the UK 1st July 2017. The harmonising of the test regulations so that they can be regulated European wide continues, it is expected to be some time before regulations are introduced for Fire Performance Cables.