Cases & enclosures
Spelsberg’s WKE 5 Junction box with IP54 / IP65 certified as per EN 60670, with electrical functional integrity E30 - E90 acc. to DIN 4102-12
safety compliance of the entire building. In addition, this method can delay failures in the electrical circuit in the occurrence of a fire. BS 7671 Amendment 3 specifies that to be specified for this role the enclosures used must be made from non-combustible materials. BS 7671 Amendment 3 only provides one
example of non-combustible material: “21.1.201 (…) NOTE 1: Ferrous metal, e.g. steel, is deemed to be an example of a non- combustible material.” Otherwise, it does not define what non-
combustible materials are or what material properties and performances are expected from electrical enclosures. Furthermore, in Europe there is currently no harmonised regulation on system circuit integrity in the event of fire. Therefore, different equipment protection companies adhere to different norms. The stricter and most commonly applied
guidelines are the ones provided by the German standard DIN 4102-12 “Fire behaviour of building materials and elements – Fire resistance of electric cable systems required to maintain circuit integrity – Requirements and testing”. According to these, the electrical equipment must remain operational for at least 30, 60 or 90 minutes, in order to let the people inside leave the building. In this case, the minimum duration for functional integrity of electrical systems is expressed as an ‘E’ followed by the number of minutes of functional integrity. For example, E60 indicates that the enclosure can resist fire for a minimum of 60 minutes. In order to design in fire safety in a new or
renovated building, it is important to be assisted by an electrical enclosure company that is fully conversant and compliant with the existing regulations. One that adopts the best
fire safety standards, such as DIN 4102-12. An example of DIN 4102-12 compliant
electrical circuit protection systems are Spelsberg’s distribution boards, cable junction and connection boxes. The company manufactures and tests its WKE fire protection enclosures in accordance with DIN 4102-12 and they guarantee electrical functional integrity for 30 to 90 minutes (E30 to E90) in the event of a fire. In addition, fire resistant junction boxes’
terminal blocks offer additional durability in conditions of extreme heat. To provide this additional protection, Spelsberg pre-fits its WKE range of junction and connection boxes with ceramic terminals. To conclude, it is not only important to build electrical equipment that is fire resistant at the point of installation, but to ensure that cost- effective maintenance and building updates will not affect its fire safety performance. Electrical circuits should not fail instantly, in the event of a fire, but should remain functional and integral to allow rescue and escape of people inside the building. Therefore, it is crucial to consider if the electrical circuit protection systems adhere to any regulations concerning functional integrity and how stringent they are. To get the highest fire resistance
performance for electrical equipment in buildings, it is essential to discuss with electrical installation specialists what solution fits best and how to maintain it properly. Spelsberg WKE fire protection enclosures offer reliable solutions for electrical installations in fire protection walls and ceilings. The company also has an expert in-house technical team that can also assist with project planning and ensure the systems are safely fitted and mounted in a short amount of time.
Spelsberg UK Instrumentation Monthly August 2019
www.spelsberg.co.uk 17
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45 |
Page 46 |
Page 47 |
Page 48 |
Page 49 |
Page 50 |
Page 51 |
Page 52 |
Page 53 |
Page 54 |
Page 55 |
Page 56 |
Page 57 |
Page 58 |
Page 59 |
Page 60 |
Page 61 |
Page 62 |
Page 63 |
Page 64 |
Page 65 |
Page 66 |
Page 67 |
Page 68 |
Page 69 |
Page 70 |
Page 71 |
Page 72 |
Page 73 |
Page 74 |
Page 75 |
Page 76 |
Page 77 |
Page 78 |
Page 79 |
Page 80 |
Page 81 |
Page 82
