ERICO ISODC Isolated Downconductor System - Manual (Page 18)

18 www.erico.com
If the maximum cable limitations in Table 4 can not be adhered to, then it is possible to use two parallel downconductors.
The ISODUAL adapter allows a second isolated downconductor to be connected to the air terminal. The second ISODC
Downconductor is mounted externally to the Isolated Mast and fixed with UV stable non conductive cable ties.
If the routes are symmetrical, are on opposing sides of the structure and connect to a common equipotential grounding system (e.g.
counterpoise ring), then a kc factor of 0.5 can be used, effectively doubling the permitted length compared to single conductor.
Contact ERICO
® for advice when this is not possible.
Figure 12. ISODUAL Dual Coupling.
ANNEX A: ISODUAL DUAL COUPLING
ISODUAL