| Decree of MV No. 246/2001 Col. Stipulation of safety fire conditions and performance of state fire supervision (decree about fire prevention) (Primary decree No. 21/1996 Col. that legally treated this area is cancelled according to § 54.) Fire-technical characteristics of materials occuring in given space are also evaluated among others in order to appreciate fire hazard according to Decree No. 246/2001 Col. PTCH definition according to § 1i) Material characteristic expressed by measurable value or determined on the basis of measurable values of more partial properties and/or an effect that comprehends material behaviour with burning process or is connected with it. Estimating criterion for PTCH rating is with wires and cables their resistance to flame propagation. Following test standards can be used to verify this resistance: CSN 34 7007 CSN 34 7010 CSN EN 50266 CSN IEC 332 CSN EN 60332 CSN EN 50265 CSN EN 60331 (used formerly, invalid standards at the present) Note: Mentioned test standards contain the same type of test, while each of them has another historical validity, ie. for each wire or cable was used that test standard which was valid during design and development of the given wire or cable. Actual valid standards are written in bold style. The actual valid test standard will be used to estimate resistance to flame propagation with review of a product or its technical specification. |