Chapter 3: System planning Site planning
Page
3-15
Hazardous locations
Check that the ODUs will not be exposed to hazardous gases, as defined by HAZLOC (USA) and ATEX
(Europe) regulations. If there is a risk of such exposure, then order the PTP/PMP 450i ATEX/Hazloc
product variants, as these are intended for operation in locations with gas hazards. The ATEX and
HAZLOC standards limit the EIRP as shown in Table 84.
Table 84 EIRP limits from ATEX and HAZLOC standards
ATEX gas
group
HAZLOC gas
group
Typical gas type
Maximum EIRP
(Watt)
IIA D Propane 6
IIB C Ethylene 3.5
IIC B Hydrogen 2
IIC A Acetylene 2
Further reading
For information about… Refer to…
Ordering Connectorized/ Integrated
ATEX/HAZLOC ODUs
Table 68 and Table 69 on pages 2-69 and 2-71
ATEX/HAZLOC standards and type approval
Hazardous location compliance
in Legal and
Open Source Guide.
Deployment of ATEX/HAZLOC ODUs PMP/PTP 450i Hazardous Location Safety
Guidance (pmp-1712)
Drop cable grounding points
To estimate how many grounding kits are required for each drop cable, refer to the site installation
diagrams (Figure 46 , Figure 47, and Figure 48) and use the following criteria:
• The drop cable shield must be grounded near the ODU at the first point of contact between the
drop cable and the mast, tower or building.
• The drop cable shield must be grounded at the building entry point.
For mast or tower installations (Figure 46), use the following additional criteria:
• The drop cable shield must be grounded
at the bottom of the tower, near the vertical to horizontal
transition point. This ground cable must be bonded to the tower or tower ground bus bar (TGB), if
installed.
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