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 Effective
Fire Breaks
FIRE-STOP SYSTEMS' Thermalastic 83C™
Fire Retardant Cable Coating is Factory Mutual Approved
for preventing flame spread in grouped electrical cables.
Thermalastic 83C™ functions by cutting off
oxygen from the fuel source, inhibiting the combustion
process in the immediate vincinity of the cable insulation
and reducing heat transmission to the protected cables.
In the simplest sense, the coating converts a group
of cables into one large single cable, covered with
a fire retardant jacket.
Cable Coating Fire Breaks have been proven to be an
effective, dependable and economical way to prevent
fire spread in cable trays.
| Some
practical locations for fire breaks are: |
| * |
Where
vertical trays pass through grated floors or other
floor penetrations where penetration fire seals
are not practical; |
| * |
At
vertical and horizontal cable tray tees and crosses;
|
| * |
In
cable trays running under grated floors where flam-mable
materials and trash collect; |
| * |
In
long horizontal tray runs, particularly where stacked
tray conditions exist. |
Total
Electrical Cable Fire Protection
Thermalastic 83C™ Cable Coating
is also one of the most economical and maintenance-free
ways to protect cables from fire in electrical equipment,
cable spreader and control rooms. It is totally
reliable because there are no electrical or mechanical
activating devices to fail, no human error to be concerned
about, no tanks to refill and no periodic maintenance.
Thermalastic 83C™ provides reliable, maintenance
free, low cost fire protection that few, if any other,
systems can match.
Thermalastic 83C™ also protects cable insulation
from exposure type fires such as those caused by burning
trash, lube oil or other flammables that may accumulate
around some cable trays.
The duration of time that Thermalastic 83C™
can protect electrical cables from a fire before the
insulation begins to deteriorate will depend on the
intensity of the flame, type and size of cables, type
of insulation and other variables. In the event that
a maximum time lapse protection from exposure fire is
desired, a heavier coating can be applied to those areas.
| How
Does Thermalastic 83C™ Work? When
exposed to fire: |
| * |
Thermalastic
83C™ produces cooling vapors from metal-lic
hydrates in the coating. These vapors reduce the
heat transmission to the protected cables. |
| * |
Inorganic
components in the coating form a surface of high
emissivity that results in the radiation of significant
amounts of heat away from the cables. |
| * |
Fire
retardants in the coating form products in the fire
that inhibit the combustion process in the immediate
vicinity of the cables. |
Effect
on Current Carrying Ampacity
While Thermalastic 83C™ is very effective
in blocking the extreme heat of fire because of high
temperature changes thai take place in the coating,
it has no adverse effect on Iow temperature heat dissipation
that might effect cable ampacity. The reasons for this
are:
- The
Iow temperature thermal conductivity of
Ther-malastic 83C™ is almost identical
to P.V.C.
- The
increase in cable diameter and slightly
rougher surface after the cable coating
is applied provides more cooling surface
area to the cable.
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NO ELECTRICAL DE-RATING OF THE CABLES IS NECESSARY.
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