|
 Effective
Fire Breaks
FSS 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 flamable
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 metalic 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
low temperature thermal conductivity of Thermalastic
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.
|
NO ELECTRICAL DE-RATING OF THE CABLES IS NECESSARY.
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