2 MR System Interconnects Routing Requirements
2.1 General Requirements
1. The customer is responsible for the purchase and installation of all cable support
mechanisms
2. Any type of cable support may be used, such as commercially available Ladder or Channel
style cable trays or non-ferrous Unistruts, provided the cable trays meets all MR system
requirements
3. The distance between cable supports must be less than 12 in. (305 mm). For example, the
distance between rungs on a ladder tray, or the distance from the end of a cable tray to a
final non-ferrous Unistrut must be 12 in. (305 mm) or less)
4. The cable supports must have a minimum cable bend radius per MR System Cable
Specifications. For example, the vertical and horizontal bends of the gradient cables must
have a bend radius of 8.39 in. (213 mm).
5. Cable supports may be stacked or side-to-side
6. Cables must be accessible on at least one side of the cable support and require a minimum
of 10 in. (254 mm) from the top of the tray. (For example, see item E in
this is not possible due to obstructions, see the exceptions below
Exceptions for Obstructions:
1. The top of the cable tray must not touch an obstruction. A minimum of 10 in. (254 mm) of
clearance is required on either side of the obstruction. See item A in
.
2. A minimum of 7 in. (178 mm) of clearance is required from the top of the tray rung to the
lowest point of any obstruction. See item B.
NOTE:
The illustration below shows how to route cable trays around HVAC ducts, light
fixtures, medical gases, structural beams, and other obstructions. If local code
permits, a tray with a bend can route the cables underneath an obstruction. At the
rear of the magnet, the cable tray must be installed at the minimum height. The part of
the cable tray that is under the obstruction can be installed at a lower height. The tray
bend must provide the minimum cable bend radius.
SIGNA Voyager Pre-Installation
Direction 5680008–1EN, Revision 2
Chapter 6 System Interconnections
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