Peak Fault Current Withstand

Overview of Peak Fault Current Withstand Capabilities of CMP Trefoil Cable Cleats at Various Mounting Intervals

Cable od (mm)Cable Cleat Peak Fault Level (kA)Cable Cleat Spacing (mm) Cat 1(1)
ConquerorCyclone ICyclone IICyclone IIIHuronPatriotSovereign
24138.80101.25123.29146.9768.59110.23155.13300
106.9671.5997.98110.2348.5088.18122.47600
87.3358.4580.0090.0039.6072.00100.00900
75.6350.6269.2777.9434.2950.9186.601200(2)
26144.70105.38128.33152.9771.39114.73161.47300
111.3374.51101.98114.7350.4891.78127.48600
90.9060.8483.2793.6841.2274.94104.08900
78.7252.6972.1081.1335.6952.9990.131200(2)
28149.93109.36133.17158.7574.08119.06167.56300
115.5377.33105.83119.0652.3995.25132.29600
94.3363.1486.4197.2142.7777.77108.01900
81.6954.6874.8284.1937.0454.9993.541200(2)
30155.19113.20137.84164.3276.68123.24173.45300
119.5980.04109.54123.2454.2298.59136.93600
97.7465.3589.44100.6344.2780.50111.80900
84.5656.6077.4587.1438.3456.9296.821200(2)
32160.28116.91142.36169.7179.20127.28179.13300
123.5182.67113.14127.2856.00101.82141.42600
100.8467.5092.38103.9345.7383.14115.47900
87.3358.4579.9990.0039.6058.7899.991200(2)
34165.21120.51146.75174.9381.63131.20184.65300
127.3185.21116.62131.2057.73104.96145.77600
103.9569.5795.22107.1247.1385.70119.02900
90.0260.2582.4592.7740.8260.59103.071200(2)
36170.00124.00151.00180.0084.00135.00190.00300
131.0087.68120.00135.0059.40108.00150.00600
106.9671.5997.98110.2348.5088.18122.47900
92.6362.0084.8495.4642.0062.35106.061200(2)
38174.66127.40155.14184.9386.30138.70195.21300
134.5990.08123.29138.7061.03110.96154.11600
109.8973.55100.66113.2549.8390.60125.83900
95.1763.7087.1698.0843.1564.06108.971200(2)
40179.20130.71159.17189.7488.54142.30200.28300
138.0992.42126.49142.3062.61113.84158.11600
112.7575.46103.28116.1951.1292.95129.09900
97.6465.3589.43100.6244.2765.72111.801200(2)
42183.62133.94163.10194.4290.73145.82205.22300
141.5094.71129.61145.8264.16116.65162.02600
115.5377.33105.83119.0652.3995.25132.28900
100.0566.9791.64103.1145.3767.35114.561200(2)
44187.94137.09166.94199.0092.87149.25210.05300
144.8396.93132.66149.2565.67119.40165.83600
118.2579.15108.32121.8653.6297.49135.40900
102.4168.5493.79105.5446.4368.93117.251200(2)
46192.17140.17170.69203.4794.95152.60214.77300
148.0899.11135.65152.6067.15122.08169.56600
120.9180.92110.76124.6054.8299.68138.44900
104.7170.0895.90107.9147.4870.48119.891200(2)
48196.30143.18174.36207.8596.99155.88219.39300
151.27101.24138.56155.8868.59124.71173.21600
123.5182.67113.14127.2856.00101.82141.42900
106.9671.5997.96110.2348.5072.00122.471200(2)
50200.35146.14177.96212.1398.99159.10223.92300
154.38103.33141.42159.1070.00127.28176.78600
126.0584.37115.47129.9157.16103.92144.33900
109.1773.0799.98112.5049.5073.48124.991200(2)
52204.31149.03181.48216.33100.96162.25228.35300
157.44105.38144.22162.2571.39129.80180.28600
128.5586.04117.76132.4858.29105.98147.19900
111.3374.51101.96114.7350.4874.94127.471200(2)
54208.21151.87184.94220.45102.88165.34232.70300
160.44107.39146.97165.3472.75132.27183.71600
131.0087.68120.00135.0059.40108.00149.99900
113.4575.93103.91116.9151.4476.36129.901200(2)
56212.03154.66188.33224.50104.77168.37236.97300
163.39109.36149.67168.3774.08134.70187.08600
133.4089.29122.20137.4860.49109.98152.75900
115.5377.33105.81119.0652.3877.76132.281200(2)
58215.78157.39191.66228.47106.62171.35241.17300
166.28111.29152.32171.3575.40137.08190.39600
135.7690.87124.37139.9161.56111.93155.45900
117.5778.70107.69121.1753.3179.14134.621200(2)
60219.47160.08194.94232.38108.44174.28245.29300
169.12113.19154.92174.2876.69139.43193.65600
138.0892.42126.49142.3162.61113.84158.11900
119.5880.04109.53123.2454.2280.49136.921200(2)
62223.10162.73198.16236.22110.24177.17249.34300
171.92115.07157.48177.1777.95141.73196.85600
140.3793.95128.58144.6663.65115.72160.72900
121.5681.36111.34125.2855.1281.82139.191200(2)
64226.67165.33201.33240.00112.00180.00253.33300
174.67116.91160.00180.0079.20144.00200.00600
142.6195.45130.64146.9764.67117.57163.29900
123.5182.67113.12127.2856.0083.13141.411200(2)
66230.18167.90204.45243.72113.74182.79257.26300
177.37118.72162.48182.7980.43146.23203.10600
144.8296.93132.67149.2565.67119.40165.83900
125.4283.95114.87129.2556.8784.42143.611200(2)
68233.64170.42207.53247.39115.45185.54261.13300
180.04120.50164.92185.5481.64148.43206.16600
147.0098.39134.66151.5066.66121.19168.32900
127.3185.21116.60131.2057.7285.69145.771200(2)
70237.05172.91210.56251.00117.13188.25264.94300
182.67122.26167.33188.2582.83150.60209.17600
149.1599.83136.63153.7167.63122.96170.78900
129.1786.45118.30133.1158.5786.94147.891200(2)
72240.42175.36213.55254.56118.79190.92268.70300
185.26124.00169.71190.9284.00152.74212.13600
151.26101.24138.56155.8968.59124.71173.20900
131.0087.68119.98135.0059.4088.18149.991200(2)
74243.73177.78216.49258.07120.43193.55272.41300
187.82125.71172.05193.5590.73154.84215.06600
153.35102.64140.48158.0469.54126.43175.59900
132.8188.89121.64136.8660.2289.39152.061200(2)
76247.00180.17219.40261.53122.05196.15276.06300
190.34127.40174.36196.1586.31156.92217.94600
155.41104.02142.36160.1670.47128.12177.94900
134.5990.08123.27138.7061.0290.59154.101200(2)
78250.23182.52222.27264.95123.64198.71279.67300
192.83129.06176.64198.7187.43158.97220.79600
157.44105.38144.22162.2571.39129.80180.27900
136.3591.26124.88140.5161.8291.78156.121200(2)
80253.42184.85225.10268.33125.22201.25283.24300
195.28130.71178.89201.2588.55161.00223.61600
159.45106.72146.06164.3272.30131.45182.57900
138.0892.42126.47142.3062.6192.95158.101200(2)

(1) CMP recommends that all fixed cleat centres are reduced to 300mm at and near to cable bends, in order to provide better restraint in these important areas.

(2) 1200mm fault levels are shown are for installations that do not include intermediate restraints. Although cables would be safely restrained with fixed cleats mounted at 1200mm intervals, CMP recommends spacing fixed cleats at a maximum of 900mm; this avoids long distances between fixed cleat centres which would allow large ‘arches’ of cables between each fixed cleat in the event of a Short circuit. With longer fixed cleat mounting intervals, these large ‘arches’ could damage the cable ladder or interfere with neighbouring components, and damage the cable insulation in the process. Alternatively, the addition of intermediate restraints fitted midway between two fixed cable cleats will prevent large cable ‘arches’ and also increase the maximum fault current capability of the circuit – please contact CMP for further details.