Which standard is better: EN or AS/NZ?
Richard Tregoweth, Thursday, September 03, 2009
Treetools sell Petzl Vent and Best helmets to arborists. Both helmets meet the ANSI Z89.1 2003 Type 1 (crown impact only) standard: Petzl Vent Class C - no protection against electrical current, and Petzl Best Class E - reduced danger from higher voltages and proof tested to 20,000 V.
Both ..