HomeMatic IP HmIP-BWTH24 Installations- Und Bedienungsanleitung Seite 57

• The "5 safety rules" to be used:
Disconnect from mains; Safeguard from switching on
again; Check that system is deenergised; Earth and short
circuit; Cover or cordon off neighbouring live parts;
• Select suitable tool, measuring equipment and, if neces-
sary, personal safety equipment;
• Evaluation of measuring results;
• Selection of electrical installation material for safeguard-
ing shut-off conditions;
• IP protection types;
• Installation of electrical installation material;
• Type of supply network (TN system, IT system, TT system)
and the resulting connecting conditions (classical zero
balancing, protective earthing, required additional meas-
ures etc.).
Installation may only take place in normal com-
mercial switch boxes (device boxes) in accord-
ance with DIN 49073-1.
Please observe the hazard information in section
„2 Hazard information" on page 50 during in-
stallation.
Permitted cable cross sections for connecting to the wall
thermostat are:
rigid cable
2
[mm ]
0.75 – 1.50
flexible cable with/without ferrule
2
[mm ]
0.75 – 1.50
Start-up
57