Motorola 2.1 - Manual (Page 76)

Chapter 4: Site Selection and Deployment Guidelines
• MOTOMESH Duo devices may be mounted on a pole having a diameter of 1-
3.5 inches, utilizing the pivot mounting bracket.
• Users and installers must be provided with antenna installation and transmitter
operating conditions to satisfy RF exposure compliance.
• The IAP MUST have an Ethernet connection to your wired network
infrastructure.
• Type A-Light Duty sites have impedance requirements of 25 ohms or less to
ground whereas Type B- Light Industrial/Commercial sites have impedance
requirements of less than 5 ohms to ground. MOTOMESH Duo 2.1 networks fall
into the Type B-Light Industrial/Commercial category, and therefore must be
treated with greater considerations as far as grounding requirements are
concerned.
Street Lights
If the MOTOMESH Duo device is attached to a light arm and the attachment point meets the Type B
grounding requirements, then the grounding stud attachment point is not required to be used. Since Type
B grounding requirements stipulate 5 ohms or less impedance to earth ground, things such as soil pH,
type of grounding rods, size of conductors, and ground enhancing materials must be taken into account to
achieve this goal. To verify the impedance requirements are met, a special Earth/Ground Resistance
Tester (megohmmeter) may be necessary.
MOTOMESH Duo devices should be mounted on the horizontal arm of the streetlight. If this cannot be
accomplished then a stand off bracket should be used to ensure adequate separation from the pole and
additional grounding must be supplied.
When using a photocell power cable you must verify that street light power is between 90-264
VAC.
Roof Mount
When mounting on roof tops care must be taken to ensure devices are not significantly higher than
surrounding devices. Devices mounted at larger heights are more vulnerable to
lightning strikes. They
are also more susceptible to interference. When mounting on the side of a building make sure a standoff
bracket is used to provide adequate separation between the building surface and the MOTOMESH Duo
device. These mounts can be obtained through a variety of distributors.
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