Table of Contents
Advertisement
5.4
Electrical Connection
Internal wiring
Incorrect wiring inside enclosure!
External Wiring
Danger due to improper cables!
Danger due to improper cable glands!
Protective Earth (PE) and equipotential (EP) bonding conductor connection
Always connect the protective earth (PE) and equipotential (EP) bonding conductor!
Cross-sectional area of
phase Conductor S mm
S ≤ 16
16 < S ≤ 35
S>35
IM.EJB.X.01.2019
Strictly adhere to wire size and length for which heat loss dissipation are
taken into account for permissible wattage for a given T Class. In case of
non-compliance explosion protection can no longer be guaranteed.
Strictly adhere to the creepage and clearance required.
Use only insulated wires of suitable voltage grade.
Mounting rails or components must be loosened and fastened properly.
The cables must comply with IEC/EN 60079-14 and relevant regulation and
must have the required cross section.
Strictly adhere to cable size and length for which heat loss dissipation are
taken into account for permissible wattage for a given T Class and ambient
temperature.
In case of non-compliance explosion protection can no longer be
guaranteed.
The cable glands shall be appropriate to cable type and size and with
suitable approval as per IEC/EN 60079-14.
Entry threads have been marked on enclosure by sticker, please use cable
gland of appropriate size and type.
In case of non-compliance explosion protection can no longer be
guaranteed.
The device is equipped with one internal and one external earthing stainless
steel screw, 1 No. tooth (Anti-rotational) washer and 2 No. plain washers.
Use ring type lug of suitable material and size to be affixed between 2 plain
washers.
The PE and EP conductor size shall be as under:
2
IECEx/ATEX
Minimum
cross-
sectional area of PE
2
conductor in mm
S
16
0.5 S
Minimum
cross-sectional
area of the EP conductor in
2
mm
Minimum 4mm2 or same as
PE conductor if it is intended
to serve as PE conductor also.
Page 11
Advertisement
Table of Contents
