4.
There universally applicable technique for classifying insulation
materials with regard their tendency form creepage paths.2 CTI Value
CTI Comparative Tracking Index
The CTI value comparative index for the formation creepage paths.8. 4. The growing
importance plastics, rapidly replacing ceramic for insulating materials,
made specification necessary.
EN 175 301-801 specifies that connector inserts based ISO 1043,
Parts 1+2/1990 must marked with the identification mark for the plastic
used.1.1 Identification
A bill currently being debated the European parliament specifies that
plastic components heavier than must have material identification.
. Insulation
materials vary the way they form creepage paths the presence of
contamination and voltages.
178 ____________________________________________________________
Fig.214: Material identification
4. This identification will make easier recycle the materials the
end their useful life. CEE Publication 17, dated October, 1958,
describes method for testing creepage current resistance.8
