Greenhouses and Horticultural Enterprises

§705 — Horticultural Enterprises and Greenhouses

Special room with elevated risks: moisture, mechanical damage, fire hazard during CO₂ fertilization and assimilation lighting.

Requirements

• Minimum IP44 for equipment in the greenhouse (IEC 60364-7-705, art. 705.512.2); a higher IP rating may be needed because of the environment (spraying, cleaning, dust) and follows from the risk assessment per room.
• 30 mA RCD on socket-outlets up to 32 A and on final circuits for portable equipment.
• RCD of at most 300 mA as fire protection for the other circuits (see NEN 1010 §705).
• Verification of the exact clause numbers and IP requirements by a reviewer is pending (needs-human).
• Main equipotential bonding on metal gutters, walkways, and CO₂ pipes.

Practice in Westland greenhouses

• Assimilation luminaires (HPS 600/1000 W or LED): keep in mind that HF interference can blind RCD type A — type F or B is recommended.
• Pt1000 sensors for climate control: see Practical → Pt1000 3-wire connection.
• Many inverters on one RCD → cumulative leakage current check mandatory.
• Priva, Hoogendoorn, Hortimax — note proprietary connectors, but the 1010 requirements apply in full.