BS EN 61347-2-2. Lamp controlgear - Part 2-2. Particular requirements for d.c. or a.c. supplied electronic step-down convertors for filament lamps Ingestion-build-224916 Upset (resistance butt) welding

Upset (resistance butt) welding

Revised guidance on the properties of gauzes used in the water retention test

The aim of BS EN 12107 series is to provide best industry requirements that ensures safe and reliable use of smoke and heat control systems

it is not intended to imply that full compliance with all requirements of any recommended standard should be implemented

The method is kept as close as possible to the ISO 10140[4] series and yields the same results within the range of uncertainty and within the range of application

BS EN 61347-2-2. Lamp controlgear - Part 2-2. Particular requirements for d.c. or a.c. supplied electronic step-down convertors for filament lamps Ingestion-build-224916 Upset (resistance butt) welding