Samson 3767 - Electrical Connections

36 EB8355-2EN
Connections
4.2 Electricalconnections
DANGER!
For electrical installation, observe the
relevant electrotechnical regulations
and the accident prevention regula-
tions that apply in the country of use.
In Germany, these are the VDE regu-
lations and the accident prevention
regulations of the employers’ liability
insurance.
The following regulations apply to in-
stallation in hazardous areas:
EN60079-14:2008 (VDE 0165,
Part1) Explosive Atmospheres– Elec-
trical Installations Design, Selection
and Erection.
Adhere to the terminal assignment.
Switching the assignment of the elec-
trical terminals may cause the explo-
sion protection to become ineffective.
Do not loosen enameled screws in or
on the housing. The maximum per-
missible values specied in the EC-
type examination certicates apply
when interconnecting intrinsically
safe electrical equipment (U
i
or U
0
, l
i
or I
0
, P
i
or P
0
, C
i
or C
0
and L
i
or L
0
).
Selectingcablesandwires
Observeclause12of EN60079-14:2008
(VDE0165,Part1)forinstallationofthein-
trinsically safe circuits.
Clause12.2.2.7applieswhenrunningmulti-
corecablesandwireswithmorethanone
intrinsically safe circuit.
The radial thickness of the insulation of a
conductor for common insulating materials
(e.g.polyethylene)mustnotbesmallerthan
0.2mm.
The diameter of an individual wire in a
ne-strandedconductormustnotbesmaller
than0.1mm.Protecttheconductorends
againstsplicing,e.g.byusingwire-endfer-
rules.
Whentwoseparatecablesareusedforcon-
nection,anadditionalcableglandcanbe
installed.
Sealcableentriesleftunusedwithplugs.
Fitequipmentusedinambienttemperatures
below–20°Cwithmetalcableentries.
Zone2/Zone22
In equipment operated according to type of
protectionExnAII(non-sparkingequipment)
accordingtoEN60079-15:2003,circuits
maybeconnected,interruptedorswitched
while energized only during installation,
maintenance or repair.
Equipmentconnectedtoenergy-limitedcir-
cuitswithtypeofprotectionExnLaccording
toEN60079-15:2003maybeswitchedun-
der normal operating conditions.
Themaximumpermissiblevaluesspecied
inthestatementofconformityanditsad-
dendaapplywheninterconnectingthe
equipmentwithenergy-limitedcircuitsin
typeofprotectionExnLIIC.