-
COPPER. ___%
conductivity when annealed.
98
-
Coating of lead. Shall extend atleast ___mm below the top of the
chimney
600
-
Bimetallic connections. Shall be installed at a point not less than
___mm above grade level
300
-
Where
downleads are concealed, connection shall be atleast ___mm above the lowest
slab
300
-
Air Terminals. Shall not extend not less than ____mm above the
object protected for 6000mm maximum intervals and not less than ____mm above the object protected for 7600mm maximum intervals
-
Air Terminals. Exceeding ___mm high shall not be supported
600
-
Air Terminal Supports. Shall be at not less than _______ the height of the air terminal
one-half
-
Flat or Gently Sloping Roofs. Which exceed ___m in width shall have additional
air terminals at intervals not exceeding ___m on the flat or gently slope areas
-
Gently Sloping Roofs are roofs having a span of ___m or less and a
pitch of one eighth or less, or roofs having a span exceeding ___m and a pitch
of one fourth or less
-
Lower Roofs. Buildings which exceed ___m above grade are
considered to protect lower roof portions
15
-
Roofs with Intermediate Ridges. Roofs with a series of parallel ridges shall
have air terminals along end ridges at terminals not exceeding ___mm
7600
-
An
air terminal shall be placed within ___mm of the end of each intermediate ridge
600
-
Irregular
Roof Lines. The edge of the roof shall be considered continuous and air
terminals shall be located within ___mm of the outermost projections of the
roof edge.
-
Max
spacing : ___m(inner)
-
Open Areas in Flat Roofs. Perimeter of open areas shall be protected if
their perimeter exceeds ___m provided either rectangular dimension exceeds ___m
-
Chimneys. ____mm thick.. when such chimneys or vents are
not within a one-to-two zone of protection of an air terminal
4.8
-
Chimney air terminals⦠___mm from an air terminal
600
-
Air Terminals. Max Spacing. ___mm or
____mm
-
Gradual
Bends. No
bend of a conductor shall form an included angle of less than ___ degrees nor
shall have a radius of bend less than ___mm
-
Supports. Conductors may be coursed through air without
support for a distance of ___mm or less. With a ___mm rod or its equivalent
support, securely fastened at each end, a conductor may be coursed through air
for a distance not to exceed ___mm
-
Roof Cross Runs. Conductors shall interconnect the air terminals
on flat or gently sloping roofs that exceed ___m in width. Intervals not
exceeding ___m
-
One-Way Drops. Conductor drops from a higher to a lower roof
level are permitted without an extra downlead provided the lower roof conductor
run does not exceed ___m
12
-
Dead Ends. Main conductor is not more
than ____mm in total length
4900
-
Down Conductors. Structures over ___m in perimeter shall have an
additional down conductor for each additional ___m of perimeter or fraction
thereof
-
Number of Down Conductors. The average distance between down conductors
shall not exceed ___m
30
-
Protecting Down Conductors. The down conductor shall be protected for a
minimum distance of ___mm above grade level
1800
-
Ground Terminals (Rods). Shall be not less than ____mm in diameter and
____mm long
-
Ground Rod Clamps. Clamps shall make contact with the ground rod
for a distance of ___mm, measured parallel to the axis of ground rod. And with
cable itself for a distance of at least ___mm
-
_____
shall be secured with at least two bolts or cap screws
Clamps
-
Variations Due to Soil Conditions. The nearest ground terminal shall be not less
than ___mm from the fountain wall
600
-
Deep Moist Clay Soil. The lightning conductor or ground terminal
shall extend vertically not less than _____mm into the earth
3000
-
Sandy or Gravelly Soil. In sand or gravel, two or more ground
terminals, at not less than ____mm spacings, shall be driven vertically to a
minimum depth of _____mm below grade
-
Shallow Top Soil. Trenches shall be not less than ____mm in
length and from ___ to ___mm in depth in clay soil. In sandy or gravelly soil,
the trench shall be not less than ___mm in length and ___mm in depth
-
Buried Copper Ground Plate. At least 0.80mm thick and having a minimum
surface area of _____
0.18m2
-
Soil Less than 300mm Deep. Structure shall be surrounded with a main-size
conductor lain in a trench or in rock crevices. Accomplished by depositing
approx. _____ of ____mm thick copper plateā¦
-
Metal Bodies. All metal bodies of conductance having an area
of _____ or a volume of _____ or greater shall be bonded to the lightning protection system
-
Bonding Requirements for Metal Bodies of
Conductance.
Bonding plate having a surface contact area or _______.
0.0019m2
-
Bonding Requirements for Metal Bodies of
Inductance.
Connections to metal bodies of inductance are required if such bodies fall
within ____mm of the main conductor or other bonded metal body
1800
-
FASTENERS > Anchors. Masonry anchors shall have a diameter of not
less than 6.4mm and shall be set with care. Capable of withstanding a pull test
of ____ Newtons
445
-
Splicers and Clamps. Pull test of ____N.
890
-
Concealment in Concrete. If roof conductors are similarly embedded,
connections to reinforcing steel shall be made at intervals not exceeding ___m
30
-
Grounding. If a ground is driven from the basement floor
level, it shall be in contact with earth for a distance of ____mm
3000
-
Structural Steel Framing > Air Terminals. Shall be bonded to the steel framework at
intervals of not more than ___m
18
-
> Grounding. Ground connections shall be made at
approximately every other steel column around the perimeter, and shall not
average over ___m apart
18
-
> Ground Terminals. Surface contact area of .not less than _____.
0.005m2
-
Protection for Heavy-Duty Stacks > General. A smoke or vent stack is classified as
heavy-duty if the cross-sectional area of the flue is greater than ______
and the height is greater than ___m
-
Materials > Corrosion Protection. Copper and bronze materials used on the upper
____mm of a stack shall have a continuous covering of lead having minimum
thickness of ____mm to resist corrosion by flue gases
-
Air Terminals > They shall be uniformly distributed around the
top of cylindrical stacks at intervals not exceeding ____mm. On square or
rectangular stacks, air terminals shall be located not more than ____mm from the
corners and shall be spaced not more than ____ mm apart around the perimeter
-
> Air terminal Heights. Height of air terminals above stacks shall be
not less than ___mm nor more than ___mm. They shall be at least ___mm in
diameter
-
> Top-mounted Air Terminals. Shall not extend more than ___mm above the top
of the stack
460
-
Heavy-duty stacks> Conductors. Shall be copper weighing not less than ___ grams
per meter without lead covering. The size of any wire in the conductor shall be
not less than
-
> Down Conductors. Not less than ___ down conductors shall be
provided. Conductors shall also be interconnected at intervals of ___m on all
stacks exceeding 60m in height
-
> Down Conductors. Shall be protected from physical damage or
displacement for a distance of not less than ___mm above grade
2400
-
Fasteners > Vertical Conductors. Shall be fastened at intervals not exceeding
____mm and horizontal conductor at intervals not exceeding ____mm
-
Splices > Pull test : ____N.. and Distance not less than ___mm,
measured parallel to the axis of conductor
-
Bonding > Bonding Plates. Surface contact area not less than _______.
0.0019m2
-
Grounding > If driven ground rods are used, they shall be
the equivalent of a copper-clad rod having a diameter of ____mm and shall be at
least _____mm in length
-
Sheet Steel. Sheet steel less than ___mm in thickness may be
punctured by severe strokes and shall
not be relied upon us protection from direct lightning strokes
4.8
-
The
minimum clearance between the Overhead
Ground Wires and the highest projection on the protected structure shall be
_____mm
1800
-
For
each 3000mm of lead between a point on the ground wire midway between the
supporting masts and ground in excess of ___m, the clearance shall be increased
by ___mm
-
Floating Roof Tanks > Protection. Where floating-roofs utilize hangers located
within a vapour space, the roof shall be electrically bonded to the shoes of
the seal through the most direct electrical path at intervals not greater than
____mm on the circumference of the tank
3000
-
> These
shunts shall consist of flexible Type
___, ____mm x ___mm wide stainless steel straps, or the equivalent in
current-carrying capacity and corrosion resistance.
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