Computer Accessories User Manual

Chapter 3 Electrical Supply Installation 45
Caution – Double pole circuit breakers are required on each rail for DC
installations. This is necessary because the return path of the current is not isolated
in the PSU.
FIGURE 3-1 on page 3-46 shows the required arrangement for single power rails.
FIGURE 3-2 on page 3-47 shows the required arrangement for dual power rails.
Note – Overcurrent devices must meet applicable national and local electrical safety
codes and be approved for the intended application.