Carbolite RHF 17/3 Installation, Operation & Maintenance Instructions Manual page 4

1700-1800° Chamber
Electrical Connections
Connection by a qualified electrician is recommended.
The smaller models are designed only for single phase electrical supplies with or without neutral.
The larger models are for 3-phase use, but can also be supplied for single phase. The furnace must
be connected only to the type and voltage of supply for which it was ordered.
The voltage or range of voltages on which the furnace may be operated is given on the furnace
rating label. Check that the supply voltage is compatible with the voltage on the label, and that the
current capacity is sufficient for the amperage on the label, before connection to the supply. A
table of the most common ratings is given in section 8.1 of this manual.
In some models supply cables are fitted, as are internal supply-rated fuses. The cable may be
directly wired to an isolator or fitted with a line plug.
The supply point must be within reach of the furnace operator and must incorporate either an
isolating switch which operates on both conductors, or a quickly removable plug.
The supply MUST incorporate an earth (ground).
CONNECTION DETAILS
Supply
1-phase
supply
3-phase
DO NOT connect a furnace ordered for three phase use to a single phase supply or to the wrong
type of three phase supply.
3.0
4
Terminal label Cable colour
L Brown
N Blue
PE Green/Yellow
Terminal label Cable colour
L1 Black
L2 Black
L3 Black
N Light Blue
PE Green/Yellow
supply type
Live-Neutral Reversible or Live-Live
To live to either power conductor
To neutral to the other power conductor
To earth (ground) to earth (ground)
to phase 1
to phase 2
to phase 3
to neutral except delta
to earth (ground)
MF22