Sequoia / Tahoe Series User Manual California Instruments
M447352-01 REV-A 47
10 40 0.100 4.00
8 55 0.063 3.47
6 75 0.040 3.00
4 95 0.025 2.38
3 115 0.020 2.30
2 130 0.016 2.08
1 145 0.012 1.74
0 170 0.0098 1.67
00 195 0.0078 1.52
000 225 0.0062 1.40
0000 260 0.0049 1.27
Table 3-4: Wire Resistance and Voltage Drop
CAUTION!
Capacitors in the power source may hold a hazardous electrical charge even if the power
source has been disconnected from the mains supply. Allow capacitors to discharge to a
safe voltage before touching exposed pins of mains supply connectors.
Power modules need at least 15 minutes to discharge to safe levels before they can be
removed.
3.6 AC On/Off Push Button
It is important to understand the purpose and operation of the On/Off Push Button of the Sequoia/Tahoe
Series unit located on the bottom-left side of the front panel. Using the On/Off Push button we are able to
switch on and switch off the LV Power supply which provides DC bias power to the entire system in other
words it does not disconnect the AC input line from the unit. The AC input power is routed through a set of
three AC line fuses (F1, F2 and F3) located in the lower left bottom of the chassis. (See Figure 3-5 for fuse
locations). These fuses protect the three amplifier and the AC input transformer from excessive input
currents. The AC input power is connected to the input transformer through a large three pole contactor.
Figure 3-7: Power On/Off Push Button
CAUTION!
The AC input fuses can only be checked if the unit is completely de-energized and
disconnected from any AC power input.
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