Risk Assessment: Construction and Civil Works
Workers Affected by Works Hazards
PREVENTIVE MEASURES
Rules for acting
Qualified/Authorised Workers (Spanish Royal Decree 614/01): Work with an electrical hazard must be carried out and/or supervised by the qualified/authorised workers deemed proper, in accordance with the stipulations of Spanish Royal Decree 614/01 and in ISASTUR procedures (see PC0712 and the corresponding Technical Instructions):
| SUMMARY CHART FOR MINIMUM STAFF TRAINING/QUALIFICATIONS | ||||||||
|---|---|---|---|---|---|---|---|---|
| NON-VOLTAGE WORK | LIVE WORK | MANOEUVRES, MEASUREMENTS, TESTS AND CHECKS | PROXIMITY WORK | |||||
| Suppressing and reconnecting the power supply | Carrying out of non-voltage work | Execution | Replacing fuses | Measurements, tests and checks | Local manoeuvres | Preparation | Execution | |
| Low voltage | A | W | Q | A | A | A | A | T |
| High voltage | Q | W | Q+AW (overseen by a Foreman) | Q (remote) |
Q o Q (aided by A) |
A | Q | A o W (overseen by A) |
| W= Any worker.
A = Authorised worker. Q= Qualified worker. Q+AW= Qualified and authorised in writing. |
1. HV work with electrical hazards cannot be carried out by workers from a Temporary Work Company (Spanish Royal Decree 216/1999). 2. The carrying out of the different activities considered is to be done in accordance with the stipulations of the present Spanish Royal Decree. |
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- The work area is to be clearly demarcated.
- Scrupulously respect safety distances as regards power lines and live parts.
| LIMIT DISTANCES FOR WORK AREAS | ||||
|---|---|---|---|---|
| Un | DPEL-1 | DPEL-2 | DPROX-1 | DPROX-2 |
| ≤1 | 50 | 50 | 70 | 300 |
| 3 | 62 | 52 | 112 | 300 |
| 6 | 62 | 53 | 112 | 300 |
| 10 | 65 | 55 | 115 | 300 |
| 15 | 66 | 57 | 116 | 300 |
| 20 | 72 | 60 | 122 | 300 |
| 30 | 82 | 66 | 132 | 300 |
| 45 | 98 | 73 | 148 | 300 |
| 66 | 120 | 85 | 170 | 300 |
| 110 | 160 | 100 | 210 | 500 |
| 132 | 180 | 110 | 330 | 300 |
| 220 | 260 | 160 | 410 | 300 |
| 380 | 390 | 250 | 540 | 700 |
| Un | rated voltage of the installation (kV). |
|---|---|
| DPEL-1 | distance to the outer limit of the danger zone when there is a risk of overvoltage caused by lightning (cm) |
| DPEL-2 | distance to the outer limit of the danger zone when there is no risk of overvoltage caused by lightning (cm). |
| DPROX-1 | distance to the outer limit of the proximity zone when it is possible to precisely demarcate the work area and to establish controls that impede anyone from going beyond this limit during the carrying out of such work (cm). |
| DPROX-2 | distance to the outer limit of the proximity zone when it is not possible to precisely demarcate the work area or to establish controls that impede anyone from going beyond this limit during the carrying out of such work (cm). |
| The distances for intermediate voltage values are to be calculated by linear interpolation. | |
Personal protection
- Helmet, safety goggles, gloves, dry work clothes, insulating boots, visor.
Procedures to apply
- ITP59.
- PC0526, PC0712.
