Mastic
No. 70 for Electrical Cable
is a specially formulated asbestos
free, water base, reinforced, intumescent
fire retardant mastic, designed primarily
for use on electrical or communication
cables and their supporting trays,
where it is either necessary or preferred
to increase fire endurance time. When
exposed to fire or high heat the coating
intumesces (puffs up) , and forms
a protective, dense foam barrier that
shields the cables and trays, thereby
retarding the penetration of heat
and propagation of flame. Mastic No.
70 should be used where maximum fire
protection is required. Dries to a
tough, hard finish. Spray application
at 1/16” wet film thickness
results in an off white, fine stucco-like
finish with dry film thickness of
31 mils.
Approvals and Standards:
* American
Bureau of Shipping – Certificate
No. 90-C20232-X
* Lloyd’s
Register of Shipping Certificate
No. SVG/F90/291
* IEEE-45
Recommended practice for electric
installations on shipboard
* IEEE-383
Standard for Type Test of Class
IE Electric cables, Field splices
and connections for Nuclear Power
Generating Stations
* ETL
Testing Laboratories Report No.
4694526 – Effect on Ampacity:
Current reduction at temperature
stability – Less than 1%.
Mastic
No. 77 for Electrical Cable
is a water base, fire retardant coating
compounded from proprietary fire retardant
resins, chemicals and non-asbestos reinforcing
fibers. It has been designed for use
on grouped electrical cables and their
supporting trays. No. 77 prevents the
propagation of fire along the cable
surfaces, and substantially increases
the fire endurance time of supporting
trays.
No. 77 dries to a tough, hard finish
with excellent abrasion resistance
and good flexibility to withstand
normal expansion and contraction,
and is resistant to deterioration
from flaking, impact, vibration and
temperature changes. The coating will
not dust, flake or spall. Spray application
at 20.5 sq. ft./US results in an off-white,
fine stucco-like finish.
Fire Tests:
Grouped cables were coated with
Flame Control Mastic No. 77 to an
average film thickness of 78 mils
(1.98mm), 5/64 “, allowed
to dry, and tested by a recognized
testing laboratory according to
requirements of The Institute of
Electric and Electronic Engineers
and were found to meet the requirements
of:
- IEEE-383-1974 Flame Test standard
for Type Tests of Class IE Electrical
Cables,Field\splices and connections
for Nuclear Power Generating Stations,
April 15, 1974
- IEEE-45 Flammability Test, Recommended
for Electrical Installations on
Shipboard”, June 30, 1977
A test conducted by a qualified independent
testing laboratory on the effect of
coatings on ampacity, demonstrated
a 0.8% electrical derating of cables
coated with Mastic No. 77.
Approvals:
Lloyds Register of Shipping, Certificate
No. Icd/F85/196 and American Bureau
of Shipping, Certificate No. 85-C28913-X.
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