44:"Bonding" is a method by which all electrically conductive materials and metallic surfaces of equipment and structures, not normally intended to be energized, are effectively connected with a low impedance path to avoid any appreciable potential difference between any separate points. Bonding ensures that all surfaces accessible to a person are at the same potential, reducing the hazard of an electric shock. A bonded system is not necessarily connected to earth, for example, in an aircraft.
32:
64:
regulations. Typically, these require a jumper at any place where the continuity of a bonding system might be interrupted, for example, where metallic conduits join an enclosure through fittings that do not assure good electrical contact. Some codes require a bonding jumper to be pulled into
47:
The common way to effectively bond different metallic surfaces of enclosures, electrical equipment, pipes, tubes or structures together is with a copper conductor, rated lugs and appropriate bolts, fasteners or screws. Other bonding means between different metallic parts and pieces might employ
51:
Effectively bonded equipment can also safely conduct phase-to-ground fault currents, induced currents, surge currents, lightning currents or transient currents during abnormal conditions. Bonding jumpers must be sized to safely handle the anticipated fault current.
75:
Bonding jumpers may be installed wherever metal parts are free to move on a hinge or bearing. This is done for electrical safety grounding, static electricity protection, and may also be useful for control of
80:. For example, a control panel door may have a bonding jumper across the hinges so that the metal door is effectively connected to ground, since the hinges may not provide a reliable contact.
72:
conductor is connected to earth ground. This must be done at only one point in each separately derived system to prevent flow of objectionable current in the earth.
83:
Temporary bonding jumpers are used in the handling of flammable liquids and gases, so that static charge on a vehicle or portable tank does not ignite escaping gas.
111:
101:
155:
77:
68:
In North
American electrical codes, an important bonding jumper is found in main electrical panels, where the system
65:
non-metallic conduit or in electrical metallic tubing that may be exposed to corrosion or mechanical damage.
21:
31:
174:
121:
69:
25:
151:
107:
133:
61:
168:
48:
brackets, clamps, exothermic bonds or welds to make effective connections.
35:
Wide metal bonding straps around the joints of a radio antenna mast.
103:
Safety and Health
Requirements Manual: U. S. Army Corps of Engineers
30:
60:Rules for bonding jumper installation are given in
148:Electrical Installations in Hazardous Locations
20:is a reliable conductor to ensure the required
8:
150:, Jones & Bartlett Learning, 1997,
92:
28:required to be electrically connected.
129:
119:
7:
100:edited by Robert H. Griffin (1999).
14:
146:Peter J. Schram, Mark W. Earley,
106:. DIANE Publishing. p. 181.
1:
78:electromagnetic interference
191:
22:electrical conductivity
36:
34:
132:has generic name (
37:
182:
159:
144:
138:
137:
131:
127:
125:
117:
97:
190:
189:
185:
184:
183:
181:
180:
179:
165:
164:
163:
162:
145:
141:
128:
118:
114:
99:
98:
94:
89:
62:electrical code
58:
42:
12:
11:
5:
188:
186:
178:
177:
167:
166:
161:
160:
139:
112:
91:
90:
88:
85:
57:
54:
41:
38:
26:metal raceways
18:bonding jumper
13:
10:
9:
6:
4:
3:
2:
187:
176:
173:
172:
170:
157:
153:
149:
143:
140:
135:
123:
115:
113:0-7881-7015-5
109:
105:
104:
96:
93:
86:
84:
81:
79:
73:
71:
66:
63:
55:
53:
49:
45:
39:
33:
29:
27:
23:
19:
147:
142:
102:
95:
82:
74:
67:
59:
56:Applications
50:
46:
43:
17:
15:
175:Electricity
130:|last=
158:, page 44
156:0877654239
87:References
122:cite book
169:Category
24:between
70:neutral
40:Bonding
154:
110:
152:ISBN
134:help
108:ISBN
171::
126::
124:}}
120:{{
16:A
136:)
116:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
