When You work with intrinsic safety the component shall not operate at mo= re=20 than two-thirds of their rated maximum current, voltage and power. Regards / Ruben=20 > > Is there any justification for the 50% or is it just a=20 > > number out of a hat? >=20 > IIRC it's a figure from experience: start at 0% and increase over the > years untill no more failures can be attributed to this aspect. >=20 > Wouter van Ooijen =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D Ruben J=F6nsson AB Liros Electronic Box 9124, 200 39 Malm=F6, Sweden TEL INT +46 40142078 FAX INT +46 40947388 ruben@pp.sbbs.se =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D _______________________________________________ http://www.piclist.com View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist