45
DO NOT DIVE.
2
DO NOT DIVE.
A residual current device (RCD) is the generic term for a device that monitors the current in the line
conductor and the neutral conductor in an earthed system.
In a circuit that’s operating properly, the vector sum of the live and neutral current values added
together will be zero. Current flowing to earth, due to a line earth fault, will return via the earth
conductor, and regardless of load conditions, will be registered as a fault. This current flow will
give rise to a residual current that will be detected by the device. If the residual current exceeds the
rated sensitivity of the RCD, it will automatically activate a tripping of the faulty circuit.
CAUTION
–
Actual wiring of RCD will vary by manufacturer of RCD. Improper wiring of RCD may
result in permanent damage to spa control pack. Repair / replacement of spa system box is not
covered under warranty when damage results from improper wiring. Actual wire attachment points
on the Spa Control Pack may vary. Always refer to the wiring diagram inside the Spa Control Pack
for proper power connection.
Two Pole RCD
Four Pole RCD
Typical specifications are as follows:
Residual Current Devices (RCDs) range
Sensitivity – from 10 to 500mA
Voltage – 2 poles: 230V; 3/4 poles:
230/400V
Connection capacity
- 25A: 6/10 mm
2
(flexible/rigid cable)
- 40,60A: 16/25 mm
2
- 80,100A: 35/50 mm
2
Total Ampere Rating
of Power System
Minimum Wire Size
Use Copper ONLY with 90˚C Insulation
Ampere Rating of
RCD Circuit-Breaker
0 A to 16 A
#12 AWG / 3.31 mm
2
20
16 A to 20 A
#10 AWG / 5.26 mm
2
25
20 A to 24 A
#10 AWG / 5.26 mm
2
30
24 A to 28 A
#8 AWG / 8.36 mm
2
35
28 A to 32 A
#8 AWG / 8.36 mm
2
40
ELECTRICAL REQUIREMENTS
230 VOLT 50 HZ – RESIDUAL CURRENT DEVICES (RCDS)
