ADTRAN 4200659L1 User Manual
Page 34
Chapter 2. Installation and Operation
2-4
MX2800 User Manual
61200659L1-1
The following UL requirements must be met during installation of
the MX2800 STS-1 DC version:
1. Disconnect all power sources prior to servicing (unit may use
multiple power sources).
2. Input: Minimum 48 VDC, 0.8 A
Minimum 120 VAC, 0.32 A
3. Connect to a reliably grounded -48 VDC source which is
electrically isolated from the AC source.
4. The branch circuit overcurrent protection shall be a fuse or
circuit breaker rated minimum 48 VDC, maximum 20 A.
5. A readily accessible disconnect device that is suitably approved
and rated, shall be incorporated in the field wiring.
6. The chassis should be connected to an earth ground using the
ground stud located between the AC and DC power sources on
the rear panel.
7. The unit shall be installed in accordance with the requirements
of NEC NFPA 70.
8. The unit shall be installed in accordance with Articles 400 and
364.8 of the National Electrical Code NFPA 70 when installed
outside of a Restricted Access Location (i.e. Central Office,
behind a locked door, or service personnel area only).
9. Care should be taken not to upset the stability of the equipment
rack after installation is complete.
To meet the UL requirements during installation, use copper
conductors only.