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Power supply for a 5kW (14.6A) multi outdoor A/C - is a dedicated circuit required?
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<blockquote data-quote="jimmybb" data-source="post: 546528" data-attributes="member: 37023"><p>Hi - </p><p></p><p>My friend it looking at having an 2.2kW Electric (5.2kW heat) multisplit inverter-type AC installed. The unit spec has a max-current listed of 14.6A, and has 20A fuse (attached). The nominal running current for the unit is expected to be <strong>5A</strong>, and the Daikin data sheet for his configuration suggests a peak of <strong>9.9A</strong> (attached).</p><p></p><p>The outdoor location has a standard readily accessible 2.5mm socket ring off a 32A MCB. Running a new connection to the consumer unit looks very disruptive. </p><p>The installer has said that it's against the regs to run the AC off the ring as a spur. Stating that 13A is the maximum single item device and as the device has a 20A fuse this is against the rules. Instead they are proposing 2x external units both under 13A peak instead. This seems somewhat counter-intuitive and wasteful in terms of space / equipment.</p><p></p><p><em>I (personally) have the 9kW Daikin installed in my property which the installers ran with 4mm SWA cable, and I've never seen it use more than 2kW! Usually it runs at 400W - 800W.</em></p><p></p><p>Do the rules specifically prohibit running a >13A appliance off a 32A ring - even if the data sheet suggests it won't exceed 10A?</p><p></p><p>Many thanks,</p><p>James</p><p></p><p></p><p>[ATTACH=full]15605[/ATTACH][ATTACH=full]15606[/ATTACH][ATTACH=full]15607[/ATTACH]</p></blockquote><p></p>
[QUOTE="jimmybb, post: 546528, member: 37023"] Hi - My friend it looking at having an 2.2kW Electric (5.2kW heat) multisplit inverter-type AC installed. The unit spec has a max-current listed of 14.6A, and has 20A fuse (attached). The nominal running current for the unit is expected to be [B]5A[/B], and the Daikin data sheet for his configuration suggests a peak of [B]9.9A[/B] (attached). The outdoor location has a standard readily accessible 2.5mm socket ring off a 32A MCB. Running a new connection to the consumer unit looks very disruptive. The installer has said that it's against the regs to run the AC off the ring as a spur. Stating that 13A is the maximum single item device and as the device has a 20A fuse this is against the rules. Instead they are proposing 2x external units both under 13A peak instead. This seems somewhat counter-intuitive and wasteful in terms of space / equipment. [I]I (personally) have the 9kW Daikin installed in my property which the installers ran with 4mm SWA cable, and I've never seen it use more than 2kW! Usually it runs at 400W - 800W.[/I] Do the rules specifically prohibit running a >13A appliance off a 32A ring - even if the data sheet suggests it won't exceed 10A? Many thanks, James [ATTACH type="full" width="666px"]15605[/ATTACH][ATTACH type="full" width="371px"]15606[/ATTACH][ATTACH type="full" width="458px"]15607[/ATTACH] [/QUOTE]
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Power supply for a 5kW (14.6A) multi outdoor A/C - is a dedicated circuit required?
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