How to Install the Siemens BB-55 or BB-55R Battery Box for Your MXL System

[GideonLynn]

Installing the Siemens BB-55 or BB-55R Battery Box for your MXL/MXLV/MXL-IQ System requires careful attention to detail. Before you begin, consider the enclosure's weight and size, local codes, and the installation surface (it should be clean, dry, and free from shock and vibration). First, mount the backbox directly beneath the MXL enclosure, aligning the knockouts. Ensure the backbox is free of obstructions and the door opens fully. Mark the upper mounting bolt locations on the wall. Drill holes for the top bolts, leaving a small gap. Slide the backbox onto the top bolts, then mark, drill, and install the bottom bolts. Securely tighten all four bolts against the back wall. Next, place the batteries in the bottom of the mounted BB-55. For wiring, always turn off the main AC power. Remove knockouts from the top of the battery box and the bottom of the MXL enclosure for wire entry. Connect the Battery Wire Assembly to the batteries in the BB-55, using a minimum of 12 AWG wire if a longer length is needed. Always wire according to local codes and NEC 760. Remember the BB-55 dimensions: 24"W x 7"D x 11"H. Consulting the Siemens BB-55 and BB-55R Battery Box Instruction Manual is recommended for detailed diagrams and safety information.