Functional (technological) grounding for a hospital is made coming out of requirements in the technical passport for equipment. The ZANDZ Technical Center recently received a request to achieve the resistance of not more than 2 Ohm. We will study our solution in detail.
Example of calculation of a hospital functional grounding
Perform a grounding device for the hospital, providing the resistance of not more than 2 ohms.
A set of measures to ensure the necessary requirements to the functional grounding system of the hospital:
- Grounding is made in accordance with the EIC 7th ed.
- Installation of a grounding device consisting of 11 vertical electrodes 6 m long united by a horizontal electrode (copper-bonded tape 30x4 mm). The distance from the horizontal electrode to the object should be not less than 1 m, deepening 0.5 - 0.7 meters.
Hospital's grounding device resistance calculation:
The design resistance of the grounding device is 1,95 Ohm.
Figure 1 shows the arrangement of equipment.
Table 1 gives the list of the required equipment and materials.
Figure 1 - Location of equipment for hospital functional grounding.
Электрод- Electrode L = 6m, D=14mm
Полоса омедненная – Copper-bonded tape 30 x 4mm
Table 1 - List of equipment and materials for hospital grounding.
|№||Image||Product item||Product||Quantity, pcs.|
|1.||ZZ-001-065||ZANDZ Copper-bonded threaded grounding rod (D14; 1.5 m)||44|
|2.||ZZ-002-061||ZANDZ Threaded coupler||34|
|3.||ZZ-003-061||ZANDZ Starting tip||11|
|4.||ZZ-004-060||ZANDZ Driving head for a jackhammer||9|
|5.||ZZ-006-000||ZANDZ Conductive grease||4|
|6.||ZZ-008-000||ZANDZ Header for a jackhammer (SDS max)||1|
|7.||ZZ-005-064||ZANDZ Clamp for connecting conductor (up to 40 mm)||13|
|8.||ZZ-007-030||ZANDZ Waterproof tape||4|
|9.||GL-11075-50||GALMAR Copper-bonded tape (30 * 4 mm / S 120 mm²; coil of 50 meters)||2|
|10.||ZZ-500-110||ZANDZ Grounding conductor (10m; S25, single-core, with a tip for the bolt D8)||1|
Any questions about hospital functional grounding? Please contact our ZANDZ Technical center!