Installation guide

Site Preparation
BlackDiamond 20808 Switch Hardware Installation Guide
38
● When connecting power to installed equipment, avoid connecting through an extension cord or
power strip.
● If your switch includes more than one power supply, connect each power supply to different,
independent power sources.
If a power source fails, it will affect only the power supply to which it is connected. If all switch
power supplies are connected to a single power source, the entire switch is vulnerable to a power
source failure.
For power specifications of the BlackDiamond 20808 switch, see Appendix B, “Technical Specifications.”
WARNING!
The chassis does not have a switch for turning power to the unit on and off. For systems using AC power supplies,
power to the chassis is disconnected by removing the wall plug from the electrical outlet. For systems using DC
power supplies, power to the chassis is turned off by de-energizing the circuit that feeds the power supply, which is
usually accomplished by turning off a circuit breaker.
AC Power Cord Requirements
Use an AC power cord appropriate for your country. Check your local electrical codes and regulatory
agencies for power cord requirements. The countries listed in Table 9 have additional requirements as
listed in the table.
NOTE
Make sure that each installed AC power supply attaches to an independent power source.
Table 9: AC Power Cable Requirements
Country Requirements
USA and
Canada
• The cable set must be UL-approved and CSA-certified.
• The minimum specification for the flexible cable is No. 14
AWG (1.5 mm
2
), Type SVT or SJT, 3-conductor.
• The cable set must have a rated current capacity of at least the amount rated for each
specific product.
• The attachment plug must be either an Earth-grounding type with a NEMA 6-20P (20 A, 220
V) configuration or a NEMA L6-20P (20 A, 208/240 V)
Denmark The supply plug must comply with section 107-2-D1, standard DK2-1a or DK2-5a.
Switzerland The supply plug must comply with SEV/ASE 1011.
Argentina The supply plug must comply with Argentinian standards.