BS 7798:1998
Current
The latest, up-to-date edition.
Specification for industrial immersion heaters using metal-sheathed elements
Hardcopy , PDF
English
15-05-1998
Important note : Users cannot be edited or removed once added to your Multi user PDF.
Committees responsible
Foreword
Specification
1 Scope
2 References
3 Definitions
4 Heating elements
5 Rating
6 Degree of protection
7 Electrical insulation
8 Thermal insulation
9 Construction
10 Supply connections
11 Terminations for external conductors
12 Provision for earthing
13 Internal wiring
14 Mounting of components
15 Screws and connections
16 Creepage distances, clearances and distances through
insulation
17 Controls
18 Labels and warning notices
19 Routine testing
20 Instructions
21 Marking
Annexes
A (normative) Methods of test
B (informative) Guidance for installation of immersion
heaters
Tables
1 Power output
2 Minimum thickness of metallic enclosures
3 Terminal sizes
4 Fastening strength of terminals
5 Dimensions of pillar terminals
6 Dimensions of screw terminals
7 Dimensions of stud terminals
8 Minimum spacings
9 Creepage distances and clearances
10 Temperature marking for supply connections
11 Symbols for marking
A.1 Torque values for screw torque test
A.2 Torque values for screw torque test, for terminals
described in 11.2.3 and 11.3.3
List of references
Defines requirements for industrial electric immersion heaters meant to be permanently installed in cylinders or tanks for heating liquids, where the heaters have fixed, replaceable or removable elements. Not applicable to immersion heaters for mounting over the side of tanks, nor to those designed for household use.
| Committee |
RHE/24
|
| DevelopmentNote |
Supersedes 92/04453 DC (10/2005) Reviewed and confirmed by BSI, December 2009. (11/2009)
|
| DocumentType |
Standard
|
| Pages |
24
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This British Standard specifies requirements for industrial electric immersion heaters designed for permanent installation in cylinders or tanks, for the heating of liquids.
The heaters may have fixed, replaceable or removable elements.
This standard does not apply to immersion heaters for mounting over the side of tanks, nor to heaters designed for household use.
| BS EN 60730-1:2011 | Automatic electrical controls for household and similar use General requirements |
| BS 7671:1992 | REQUIREMENTS FOR ELECTRICAL INSTALLATIONS |
| BS 5406-2:1988 | Disturbances in supply systems caused by household appliances and similar electrical equipment Specification of harmonics |
| BS 3456-201:1990 | Specification for safety of household and similar electrical appliances General requirements |
| BS 93:1951 | Specification for British Association (B.A.) screw threads with tolerances for sizes 0 B.A. to 16 B.A. |
| BS 6004:1991 | Specification for PVC-insulated cables (non-armoured) for electric power and lighting |
| BS EN 60439-1:1999 | Low-voltage switchgear and controlgear assemblies Type-tested and partially type-tested assemblies |
| BS 3535-2:1990 | Isolating transformers and safety isolating transformers Specification for transformers for reduced system voltage |
| BS 5467:1989 | Specification for cables with thermosetting insulation for electricity supply for rated voltages of up to and including 600/1000 V and up to and including 1900/3300 V |
| BS 7351:1990 | Specification for metal-sheathed heating elements for industrial use |
| BS 5406-3:1988 | Disturbances in supply systems caused by household appliances and similar electrical equipment Specification of voltage fluctuations |
| BS 3535-1:1990 | Isolating transformers and safety isolating transformers General requirements |
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.