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By purchasing, you accept responsibility for ensuring the compatibility and suitability of the product and any associated parts. Confirm correct selection with your licensed installer prior to purchase.
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Learn more by watching our NLS 30318 | Solid Mounting Block 20mm video.
The NLS 30318 is a solid 38mm deep mounting block rated for surface mounting standard wall plates with 84mm centers on walls or ceilings. The 30318 features heavy-duty PVC construction and solid backing, making it suitable for installation on metal surfaces such as sheds, where cable protection all around is required. Supplied with 2x wall plate mounting screws and cable entry plugs included.
Electricians mounting on metal surfaces (sheds, industrial) typically specify solid mounting blocks because the solid backing resists corrosion and the deep cavity protects cable runs from damage. The NLS 30318 solves the common jobsite problem: when drywall mounting isn't an option, the solid construction provides a professional, code-compliant surface. The 84mm center spacing matches standard Australian wall plate dimensions, so no adapters or custom drilling is needed on the majority of installations.
The trade benefit of the NLS 30318 is dual-entry flexibility — the two 20mm conduit entries (one on each side) let the sparky run cable entry from left or right without remodelling. Heavy-duty PVC resists UV and corrosion better than standard plastic, extending the lifespan on outdoor and industrial jobs. The 35mm internal cavity gives plenty of room for multiple cable terminations, reducing the need for deeper boxes on high-density circuits.
The NLS 30318 is not suitable for flush drywall mounting where a shallow backing plate (14–16mm) is required. It is intended for metal, industrial, or solid-surface applications only. For standard internal drywall power points and light switches, a shallow mounting block (16mm) is the more appropriate choice.
Verified Sparky Direct customer reviews: NLS Solid Mounting Block (30318)
"This mounting block is solid and works as expected." — Howard
(30318)
The 30318 is a solid 38mm deep block designed for metal surfaces like sheds and industrial installations; shallow mounting blocks (14–16mm) are for flush drywall mounting only. The solid 30318 provides metal-surface compatibility and a deeper cavity for cable routing. Choose the 30318 if mounting on metal, concrete, or non-drywall surfaces.
Yes, the 30318 can be installed on drywall, but it's not the typical choice for internal residential drywall mounting (a shallow block is more common). The 30318's solid backing and deep cavity make it better suited to metal sheds, industrial panels, and outdoor installations where its extra depth and corrosion resistance provide real benefit.
The internal cavity is 35mm deep, allowing room for multiple cable terminations and cable bending without tight cramping. The external depth is 38mm.
The 30318 has two 20mm conduit entries, one on the left side and one on the right side. This dual-entry design lets the sparky run cable entry from either direction without on-site modification. Unused ports are sealed with plugs included.
Yes. The heavy-duty PVC construction resists UV and corrosion, making it suitable for outdoor and industrial applications. The solid backing provides protection for cable runs in exposed environments. For maximum longevity in coastal or high-salt areas, the PVC material is more durable than standard plastic alternatives.
The NLS 30318 is available online from Sparky Direct, with Australia-wide delivery to any state or territory including regional areas. Sparky Direct is an Australian electrical wholesaler established in 2005, supplying more than 500,000 customers with transparent trade pricing.
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We want you to love what you buy—but if you change your mind, that’s okay too. That’s why Sparky Direct offers a 100-day money-back guarantee.
If your item isn’t in its original condition, please contact us before returning it—we might save you time and money.
All products come with a manufacturer’s or supplier’s warranty
Damaged or Faulty Goods
If your order arrives damaged or is faulty, let us know within 24 hours.
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How to Request a Return
Warranty starts from Invoice Date
Domestic Use: 1 Year
Commercial Use: 1 Year
Warranty Method: Return to Sparky Direct
These specifications and characteristics outline physical, mechanical, electrical details.
| Brand | NATIONAL LIGHT SOURCES |
| SKU | 30318 |
| Model # | 30318NLS |
| Barcode # | 9336700005702 |
| Package Weight | 0.150kg |
| TYPE | VALUE |
|---|---|
| Type | Electrical Accessories |
| Brand | National Light Sources |
| Colour | White |
| Width (mm) | 74 |
| Depth (mm) | 38 |
| Length (mm) | 115 |
| Material | PVC (polyvinyl chloride) |
| Box increments (This item is sold individually) | 10 |
Electrical and HVAC products sold by Sparky Direct are intended for installation by licensed and appropriately qualified professionals in accordance with applicable Australian Standards and regulatory requirements. Customers are responsible for ensuring that any product purchased, including any related or associated components, is compatible and suitable for their intended installation and application.
Sparky Direct does not provide installation advice and does not assess product suitability for individual circumstances unless expressly confirmed in writing. Customers must confirm correct product selection, compatibility, compliance, and suitability with a licensed or appropriately qualified professional prior to purchase.
Tools sold by Sparky Direct must be used safely and in accordance with the manufacturer’s instructions. Customers are responsible for ensuring they have the necessary knowledge and competence to operate any tool purchased. If you are unsure how to safely or correctly use a tool, do not use it and seek guidance from the manufacturer or a suitably qualified professional.
Nothing in this clause limits or excludes any rights or guarantees available under the Australian Consumer Law.
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